scholarly journals Mathematical Modeling and Computational Simulation of a New Biomedical Instrument Design

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Zheng Jeremy Li
Keyword(s):  
Mathematical Modeling ◽  
Computational Simulation ◽  
Manufacturing Cost ◽  
Research Papers ◽  
Biomedical Instrument ◽  
Additional Manufacturing ◽  
Biomedical Industry ◽  
Surgical Operations ◽  
Made In ◽  
Prototype Testing

Endo surgiclip instrument is the biomedical instrument that can be applied for endoscopic surgery to assist surgeons in homeostasis and secure mucosal gap surfaces during surgical operations. Since some clinic feedbacks show the surgiclip drop-off incidents which can potentially sever organ and tissue, the improvement of endo surgiclip instrument has been made in these years. Since few research papers were involved in the study of endo surgiclip instrument performance via mathematical modeling and computational simulation, currently some instrumental modifications are mainly based on clinic lab tests which prolong the improvement cycle and increase additional manufacturing cost. This paper introduces a new biomedical surgiclip instrument based on mathematical modeling, computer-aided simulation, and prototype testing. The analytic methodology proposed in this paper can help engineers in biomedical industry develop and improve biomedical instrument. Compared to the current conventional surgiclip instruments, this new surgiclip instrument can properly assist surgeon in surgical procedure with less operational force and no surgiclip drop-off incident. The prototype has also been built and tested. Both computational simulation and prototype testing show close results which validate the feasibility of this newly developed endo surgiclip instrument and the methodologies of mathematical modeling based computational simulation proposed in this paper.

Contribution of Green Productivity to the Success of Business Performance: A Literature Review

2021 ◽  
pp. 6-16
Author(s):  
R. A. S. A. Perera ◽  
T. S. M. Amarasena
Keyword(s):  
Business Performance ◽  
Business Processes ◽  
Living Standard ◽  
Manufacturing Cost ◽  
Business Practices ◽  
Research Papers ◽  
Capital Productivity ◽  
Green Productivity ◽  
Social Productivity ◽  
Environmental Concepts

Green Productivity is integrated for enhancing the profitability of the organization by improving productivity and environmental performance for overall socio-economic development. It considered the win-win situation of uplifting the quality of life in the form of generating profits to the business and considering the less impact to the environment from the business processes which leads to the greener business practices. The objective of this research paper is to review the existing literature about the practical application of the GP to identify the business areas which are influenced by the GP methodology. This is Qualitative research in nature. Nineteen existing research papers from reputed Journals are considered for the study. The content analysis method is used to analyze the research papers. The analysis results highlighted that GP methodology could be applied to any organization regardless of nature and size, and it will generate a significant contribution to the overall profitability of the organization by creating a competitive advantage in the market. GP will contribute to the organizations in two areas, (1) Productivity through reducing manufacturing cost, cycle time, risk, waste and increasing competitive advantages through social productivity, labour, and capital productivity of the business, (2) The environment in the form of reducing waste with many environmental concepts such as 3R, 5R Concepts and releasing less carbon emission to the environment. It is clear that this GP Methodology practice will enhance the development of socioeconomic and sustainability, which uplifts the living standard of all living beings in the natural environment.

Computational Biology: Development in the Field of Medicine

2021 ◽  
Keyword(s):  
Mathematical Modeling ◽  
Computational Biology ◽  
Social Systems ◽  
Computational Simulation ◽  
Analytical Data ◽  
Theoretical Methods ◽  
Simulation Techniques

Computational biology involves the development and application of analytical-data and theoretical methods, computational simulation techniques, and mathematical modeling to the study of biological, behavioral, ecological, and social systems.

scholarly journals Local Entrepreneurship in the Context of Food Production: A Review

2020 ◽  
Vol 12 (1) ◽  
pp. 424 ◽  
Author(s):  
Izabela Kwil ◽  
Katarzyna Piwowar-Sulej ◽  
Małgorzata Krzywonos
Keyword(s):  
Food Production ◽  
Local Food ◽  
Research Topics ◽  
Research Papers ◽  
Research Problems ◽  
Health Promoting ◽  
Research Gap ◽  
The Subject ◽  
Definition Of ◽  
Made In

Local food production is meaningful not only for a single producer but also for the consumer, and finally for the entire region. Therefore, it would be beneficial to take up the issue of local entrepreneurship in the context of food production. The aim of the study was to analyze important terms, research topics, and research results related to the issue of local entrepreneurship in the context of food production. Literature review revealed definitional discrepancies related to the subject of the study. Thus, the need to create an unambiguous definition of local food and local entrepreneurship was emphasized. Own definitions of these issues were provided. Most of the available publications are devoted to local food produced in selected countries. In the analyzed research papers, the problem of local food is most often correlated with marketing or health-promoting properties of local food. A research gap was identified: suggestions were made in regards to the research problems worth bringing up in empirical research in the interest of activating local entrepreneurship.

Additional Remarks on the fatal effects of air admitted into the Veins of the Neck during Surgical Operations

1845 ◽  
Vol 1 ◽  
pp. 301-301
Author(s):  
Charles Bell
Keyword(s):  
Human Subject ◽  
Jugular Vein ◽  
External Jugular Vein ◽  
Veterinary Practice ◽  
Small Incision ◽  
Surgical Operations ◽  
Made In ◽  
Fluid Milk

“He stated some interesting facts from veterinary practice. But the principal addition he desired to make was the notice of certain experiments made on the human subject after death, and which Dr Reid repeated and verified.“A small incision being made in the lower part of the neck, the external jugular vein was found flat; but an incision being made into it on raising the shoulder and clavicle of that side, the vein opened. On holding open the integuments so that the wound might hold fluid, milk was poured into it: the milk remained stationary as in a cup; but on elevating the shoulder and clavicle, the milk descended into the vein and disappeared.

Mathematical Modeling of a Biomass Steam Gasifier—A Modified Equilibrium Approach

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Thomas Gröbl ◽  
Heimo Walter
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Present Article ◽  
Equilibrium Model ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Equilibrium Models ◽  
Gasification Process ◽  
Equilibrium Approach ◽  
Made In

A large potential is contributed to the energetic utilization of biomass, whereby thermochemical gasification seems to be especially interesting. In order to contribute to a better understanding of the thermochemical conversion process in the gasifier, mathematical models are used. An intensive effort is made in development of mathematical models describing the gasification process and a large number of models, considerably differing in their degree of simplification, and their applications are reported in literature. In the present article, a brief review of models applied, mainly focused on equilibrium models, is provided and a robust and flexible modified stoichiometric equilibrium model, for modeling a novel gasifier, is presented.

A Device for Performing Controlled Cutting Operations

2012 ◽  
Author(s):  
Andrew M. Phan ◽  
John P. Parmigiani
Keyword(s):  
Cutting Force ◽  
Food Processing ◽  
Depth Of Cut ◽  
Optimum Parameters ◽  
Cutting Angle ◽  
Underlying Causes ◽  
Reaction Forces ◽  
Surgical Operations ◽  
Made In

Cutting operations using blades appear in several different industries such as food processing, surgical operations, gardening equipment, and so forth. Many practitioners of cutting operations will notice that it is easier to cut something by pressing and slicing at the same time versus doing each motion individually. They will also notice that certain angles or certain blade geometries make it easier to cut certain materials. As our society continues to increase our technological prowess, there is an ongoing need to better understand the underlying causes of simple tasks such as cutting so that cutting operations can be performed with more precision and accuracy than ever before. For many applications it is not possible to achieve the most optimum cutting force, cutting angle, and push to slice ratio and a compromise must be made in order to ensure the functionality of a cutting device. A means of objectively and efficiently evaluating cutting media is needed in order to determine the optimum parameters such as cutting force, cutting angle, and push to slice ratio for certain applications. The approach taken in this work is to create a testing apparatus that uses standard cutting media and performs controlled cutting operations to determine key parameters to specific cutting operations. Most devices used for performing experimental controlled cutting operations are limited to a single axis of motion, thus not incorporating the effect of the push to slice ratio. The device created and discussed in this paper is capable of performing controlled cutting operations with three axes of motion. It is capable of accurately controlling the depth of cut, push to slice ratio, and angle of cut in order to accurately capture motions seen in typical cutting operations. Each degree of freedom on the device is capable of withstanding up to 1550 N of cutting force while still capable of maintaining smooth motions. The device is capable of controlling the velocity of the push and slice motions up to 34 mm/s. Depth of cut, for both pushing and slicing, the reaction forces, and the angle of cut are all controlled and measured in real-time so that a correlation can be made between them. Data collected by this device will be used to investigate the effects of the push to slice ratio and angle of cut on cutting force and overall quality of cutting operations. Preliminary testing in wood test samples evaluates the effectiveness of the device in collecting cutting data. This device will also be used to validate several finite element analyses used in investigating cutting mechanics.

scholarly journals Construction and Use of the Regional Input-Output Model with Environmental and Economic Development Blocks

2020 ◽  
Vol 20 (3) ◽  
pp. 27-46
Author(s):  
Аlexander О. Baranov ◽  
Victor N. Pavlov ◽  
Tatiana O. Tagaeva ◽  
Yuliia M. Slepenkova
Keyword(s):  
Mathematical Modeling ◽  
Environmental Economics ◽  
Statistical Data ◽  
Environmental Issues ◽  
Environmental Data ◽  
State University ◽  
Input Output ◽  
The 1960S ◽  
Statistical Indicators ◽  
Made In

The paper analyzes environmental-economics models developed by foreign and Russian scientists. The first attempts to combine both economic and environmental issues in mathematical modeling were made in the 1960s, with most of them been theoretical due to lack of necessary data. With the development of modeling approaches, following on Wassily Leontief’s models, an environmental block has been included into input-output models. However, most of the existing models can hardly be applied to practice due to lack of statistical data and the absence of inter-industry approach. Even today the main restricting factor for these models to be used in practice is still limited availability of information, including not only economic but also environmental data, which is especially critical for regional researches, as the number of statistical indicators for the regions is much lower than at the macro level. The article provides mathematical description of the input-output model with an environmental block. The model is developed at the Institute of Economics and Industrial Engineering of the Siberian Branch of the RAS in collaboration with the Novosibirsk State University. The model can be used for regional researches, given the input-output tables for the region is available.

scholarly journals CFD STUDY THE IMPACT OF KEY PARAMETERS ON THE DISTRIBUTION OF SMOKE AND HAZARDS IN THE PREMISES

2012 ◽  
Vol 15 (1) ◽  
pp. 27-35
Author(s):  
A. Terziev ◽  
I. Antonov ◽  
Nam Thanh Nguyen ◽  
Lien Duc Hoang
Keyword(s):  
Mathematical Modeling ◽  
Numerical Simulation ◽  
Fire Protection ◽  
Temperature Field Distribution ◽  
Major Task ◽  
Acoustic Insulation ◽  
Short Period ◽  
Protection Systems ◽  
The Impact ◽  
Made In

In modern buildings more diverse and new polymeric combustible materials widely used as coverings, beddings, thermal and acoustic insulation, equipment and furniture are applied. Some of these elements are able to release large amounts of smoke and heat in a very short period of time. The building can get extremely dangerous situations in presence of fire. Since the major task of fire protection technique is protecting people from injury, some answers to the following questions are seeks: how smoke will be spread into the room, is there a chance to be taken away without burning spread, which are the general parameters defining distribution of smoke and hazards in the premises and etc. The solution of the problems raised above resorting to mathematical modeling of fires. For this purpose a numerical simulation of such processes are accomplished. Here are presented the results of spreading of smoke and hazards in a room occupied by people as particular attention is paid to a velocity and temperature field distribution. Based on the results of the numerical simulation, a scientific-based prognosis of the hazardous factors was made in order to optimize the work of the fire protection systems (smoke extraction systems, mechanical ventilation) by considering the physical characteristics of the room.

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