scholarly journals Vectorial product concentration obtained with a permeable immobilized enzyme membrane. A new approach to the analysis of biological transport systems

1986 ◽  
Vol 235 (3) ◽  
pp. 693-698 ◽  
Author(s):  
B Maïsterrena ◽  
L J Blum ◽  
G Bardeletti ◽  
P R Coulet
Keyword(s):  
Theoretical Analysis ◽  
Enzyme Level ◽  
Product Distribution ◽  
Porous Membrane ◽  
Transport Systems ◽  
Collagen Membrane ◽  
Biological Transport ◽  
New Approach ◽  
The Mathematical Model ◽  
Symmetric Systems

The theoretical analysis of the distribution on both sides of a flat porous membrane of the product generated by an enzyme covalently bound only on to one side of the membrane separating two compartments of widely different volumes is presented. Contrary to what occurs with heterogeneous symmetric systems, the diffusional limitations at the enzyme level play a prominent role, not only on the apparent enzyme activity, but also on product flux-splitting. The mathematical model developed shows that it is possible to concentrate the reaction product in the compartment opposite to that where the reaction occurs. The influence of the parameters and of the physical characteristics of an asymmetrical system on product distribution is analysed. This theoretical analysis is in excellent agreement with experimental data obtained with glucose oxidase immobilized on a porous collagen membrane.

scholarly journals A New Approach of Soft Joint Based on a Cable-Driven Parallel Mechanism for Robotic Applications

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1468
Author(s):  
Luis Nagua ◽  
Carlos Relaño ◽  
Concepción A. Monje ◽  
Carlos Balaguer
Keyword(s):  
Parallel Mechanism ◽  
Degrees Of Freedom ◽  
Kinematic Model ◽  
Experimental Tests ◽  
Humanoid Robots ◽  
Inverse Kinematic ◽  
Element Analysis ◽  
New Approach ◽  
Flexible Polymer ◽  
The Mathematical Model

A soft joint has been designed and modeled to perform as a robotic joint with 2 Degrees of Freedom (DOF) (inclination and orientation). The joint actuation is based on a Cable-Driven Parallel Mechanism (CDPM). To study its performance in more detail, a test platform has been developed using components that can be manufactured in a 3D printer using a flexible polymer. The mathematical model of the kinematics of the soft joint is developed, which includes a blocking mechanism and the morphology workspace. The model is validated using Finite Element Analysis (FEA) (CAD software). Experimental tests are performed to validate the inverse kinematic model and to show the potential use of the prototype in robotic platforms such as manipulators and humanoid robots.

Attenuation of pulsations in the reciprocating compressor piping system with an elbow-shaped surge tank

2018 ◽  
Vol 233 (5) ◽  
pp. 1677-1689
Author(s):  
Quyang Ma ◽  
Guoan Yang ◽  
Mengjun Li
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Frequency Analysis ◽  
Transfer Matrix Method ◽  
Piping System ◽  
Pulsation Frequency ◽  
Reciprocating Compressor ◽  
Pressure Pulsations ◽  
Surge Tank ◽  
The Mathematical Model

An elbow-shaped surge tank is proposed to suppress the pressure pulsations. The transfer matrix method was developed and the mathematical model was established to predict the distribution of pressure pulsations in the piping system (on which a surge tank was already installed) with an elbow-shaped surge tank. Simulation work of the whole piping system was performed. The results show that the elbow-shaped surge tank has good performance to attenuate the pressure pulsations. The frequency analysis shows that the amplitude for the first pulsation frequency is attenuated to a low level. The impulse response was analyzed to examine the efficiency of suppressing pulsations by using the suppressor. The theoretical analysis showed that there exists the optimal suppression performance when setting the distance between the elbow-shaped surge tank and the existing one. Meanwhile, modifying the ratio of length to diameter with a fixed surge volume could also impact the pressure pulsations. The analysis results can be used as a reference in designing and installing the elbow-shaped surge tank.

Simulation and Research of Dynamic Voltage Detection and Regulator Based on MATLAB

2014 ◽  
Vol 536-537 ◽  
pp. 1527-1531
Author(s):  
Ya Feng Li ◽  
Zi Wei Zheng
Keyword(s):  
Theoretical Analysis ◽  
Reactive Power ◽  
Voltage Regulator ◽  
New Approach ◽  
Dynamic Voltage ◽  
Harmonic Voltage ◽  
Simulation Results ◽  
Harmonic Source ◽  
Detecting Method ◽  
Dynamic Voltage Regulator

The Series Dynamic Voltage Regulator can compensate the harmonics distortion caused by voltage type harmonic source This paper presents a new approach of detecting harmonic voltage in dq0 coordinates, based on the generalized instantaneous reactive power ,and used in the series dynamic voltage regulator successfully. It is demonstrated by theoretical analysis and simulation results that the proposed detecting method of harmonic voltage is correct and valid.

A New Approach to the Early Prediction of Turning Chatter

1994 ◽  
Vol 116 (4) ◽  
pp. 485-488 ◽  
Author(s):  
Shan-Fei Bao ◽  
Wen-Guo Zhang ◽  
Jun-Yi Yu ◽  
Si-Mao Qiao ◽  
Fu-Lun Yang
Keyword(s):  
Theoretical Analysis ◽  
Cutting Force ◽  
Frequency Difference ◽  
Early Prediction ◽  
New Approach ◽  
Dynamic Cutting Force

A new approach to the early prediction of turning chatter is described in this paper; the interval frequency difference H in the amplitude domain of the dynamic cutting force is taken as a prediction parameter. The theoretical analysis and experiments results indicate that the approach presented can lead to a quick prediction of turning chatter with higher accuracy and adaptability.

scholarly journals Philosophical Education toward Democratization and Boko Haram Insurgency in Nigeria

2016 ◽  
Vol 9 (9) ◽  
pp. 87
Author(s):  
Felix Okechukwu Ugwuozor
Keyword(s):  
Theoretical Analysis ◽  
Civic Culture ◽  
Boko Haram ◽  
Policy Makers ◽  
New Approach ◽  
Civic Society ◽  
Philosophical Education ◽  
Educational Framework ◽  
Future Policy ◽  
Beliefs And Attitudes

<p class="apa">This paper examines Nigeria's democratization dilemmas and the imperatives of an educational framework against the backdrop of the Boko Haram insurgency. It identifies and connects the pattern, character and dynamics of the existing educational system. It also discusses the system’s failure in calling for a new approach to overcome the prevailing dearth of civic order and the increasing spread of dissent groups. This new method is about acculturating Nigerian youth into a more civic culture, a Nigeria where citizens can live side by side with each other in peace.” While examining both theoretical and practical characteristics of this new educational agenda, the paper especially examines the link between philosophical education and the development of a civic culture, trusting that such a connection suggests an approach to education that may assist future policy makers, educators, and teachers. Specific theoretical analysis of pedagogical and philosophical education contained here can further the current understanding of how philosophical education is likely to facilitate the development of the values, beliefs, and attitudes that generally underpin the operations of a civic society, developments desperately needed to address the problem of Boko Haram and the increasing spread of dissent groups in Nigeria.</p>

scholarly journals New approach to the organization of entrances to cities using ITS

2019 ◽  
Vol 298 ◽  
pp. 00076
Author(s):  
Sergey Dorokhin ◽  
Evgenii Chirkov ◽  
Sergey Postavnichii
Keyword(s):  
Transport Systems ◽  
Intelligent Transport Systems ◽  
New Approach ◽  
Large Cities ◽  
Intelligent Transport

The article analyses the use of intelligent transport systems, as a result of the study, the authors found that in large cities today, intelligent entries are not used much, which reduces the load on the entry areas. The authors propose an algorithm for organizing entry on the example of Voronezh and propose a method for passing vehicles on the main and secondary roads, as a result of which the efficiency of organizing traffic to large cities is obtained.

The New Approach to Optimization of Production – Technological Base of a Public Transport Enterprises Network on an Example of City Hanoi

2016 ◽  
Vol 838 ◽  
pp. 39-46
Author(s):  
Andrey Nikolaevich Rementsov ◽  
Victor Akimovich Egorov ◽  
Nguen Huang Manh
Keyword(s):  
Mathematical Model ◽  
Public Transport ◽  
Queuing Systems ◽  
Economic Criterion ◽  
New Approach ◽  
Systems Model ◽  
Maintenance Service ◽  
Technological Base ◽  
The Mathematical Model ◽  
To Receive

In the article application of queuing systems model in the field of operation of motor transport is presented. The system of maintenance service (MS) and operating repair (OR) of the cars on technological base is considered as multichannel multiphase queuing system. The mathematical model allows to receive necessary parameters of system MS and OR and to optimize them on technical-economic criterion.

What Can We Make of Unsubstantiated Child Abuse Reports? A New Approach

2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Michael Malcolm
Keyword(s):  
Time Series ◽  
Child Abuse ◽  
Theoretical Analysis ◽  
General Public ◽  
Child Outcomes ◽  
Empirical Approach ◽  
Previous Literature ◽  
New Approach ◽  
Data Generating Process ◽  
Statistical Time

AbstractOnly about a quarter of child abuse reports are ultimately substantiated, which has caused some concern among policymakers and the general public. But previous literature suggests that unsubstantiated and substantiated reports may not be much different from each other in terms of child outcomes. We present a Bayesian theoretical analysis of the data-generating process underlying maltreatment substantiation, and then take a new empirical approach by examining the statistical time-series relationship between substantiated and unsubstantiated reports. We show that the two series are cointegrated. This suggests that unsubstantiated reports are not mostly malicious or unfounded, but that they emanate from the same signals as verifiable, substantiated abuse.

Sign in / Sign up

Export Citation Format

Share Document