Search results

1 – 4 of 4
To view the access options for this content please click here
Article

Congcong Zhou, Chunlong Tu, Jian Tian, Jingjie Feng, Yun Gao and Xuesong Ye

The purpose of this paper is to design a low-power human physiological parameters monitoring system which can monitor six vital parameters simultaneously based on wearable…

Abstract

Purpose

The purpose of this paper is to design a low-power human physiological parameters monitoring system which can monitor six vital parameters simultaneously based on wearable body sensor network.

Design/methodology/approach

This paper presents a low-power multiple physiological parameters monitoring system (MPMS) which comprises four subsystems. These are: electrocardiogram (ECG)/respiration (RESP) parameters monitoring subsystem with embedded algorithms; blood oxygen (SpO2)/pulse rate (PR)/body temperature (BT)/blood pressure (BP) parameters monitoring subsystem with embedded algorithms; main control subsystem which is in charge of system-level power management, communication and interaction design; and upper computer software subsystem which manipulates system function and analyzes data.

Findings

Results have successfully demonstrated monitoring human ECG, RESP, PR, SpO2, BP and BT simultaneously using the MPMS device. In addition, the power reduction technique developed in this work at the physical/hardware level is effective. Reliability of algorithms developed for monitoring these parameters is assessed by Fluke Prosim8 Vital Signs Simulators (produced by Fluke Corp. USA).

Practical implications

The MPMS device provides long-term health monitoring without interference from normal personal activities, which potentially allows applications in real-time daily healthcare monitoring, chronic diseases monitoring, elderly monitoring, human emotions recognization and so on.

Originality/value

First, a power reduction technique at the physical/hardware level is designed to realize low power consumption. Second, the proposed MPMS device enables simultaneously monitoring six key parameters. Third, unlike most monitoring systems in bulk size, the proposed system is much smaller (118 × 58 × 18.5 mm3, 140 g total weight). In addition, a comfortable smart shirt is fabricated to accommodate the portable device, offering reliable measurements.

Details

Sensor Review, vol. 35 no. 2
Type: Research Article
ISSN: 0260-2288

Keywords

To view the access options for this content please click here
Article

Congcong Liu, Chong Wang, Keping Ye, Yun Bai, Xiaobo Yu, Chunbao Li and Guanghong Zhou

The purpose of this paper is to elucidate the influences of the animal fat and fatty acid type on the formation of polycyclic aromatic hydrocarbons (PAHs) and to propose a…

Abstract

Purpose

The purpose of this paper is to elucidate the influences of the animal fat and fatty acid type on the formation of polycyclic aromatic hydrocarbons (PAHs) and to propose a formation mechanism of PAHs in fat during electric roasting, which is a method of non-direct-contact-flame heating.

Design/methodology/approach

The effects of animal fats and model fat on the formation of PAHs were valued on the basis of the ultra high-performance liquid chromatography data. The corresponding products of the FAME pyrolysis were detected by TG-FTIR. The proposal formation mechanism of PAHs was based on the summary of the literature.

Findings

Contrary to the International Agency for Research on Cancer, DF had higher risk with 280.53 ng/g of concentration after being roasted than the others animal fats of red meat in terms of PAHs formation. This research also ensured the importance of fat on PAHs formation, the concentration of PAHs in pure fats was higher after being electric roasted than that in meat patties and juice which made from corresponding animal fat. What is more, during pure animal fats and meat products being processed, less PAHs formed in the fat with lower extent of unsaturation and lower content of linolenate. In the same way, methyl linolenate demonstrated the significant increasement to PAHs formation compared to the other fatty acids. And, the number of carbon atom and the extent of unsaturation in fatty acid affects the formation of PAHs during roasting. The detection of alkene and alkane allows to propose a formation mechanism of PAHs during model fat being heated. Further study is required to elucidate the confirm moleculars during the formation of PAHs.

Originality/value

This work studied the effect of the carbon atom number and the unsaturation extent of fats and model fats on the formation of PAHs. This work also assure the important of alkene and alkane on the pyrolysis of model fats. This study also researched the formation and distribution of PAHs in pure fats and meat products after being heated.

To view the access options for this content please click here
Article

Zhenyang Zhu, Yi Liu, Zhe Fan, Sheng Qiang, Zhiqiang Xie, Weimin Chen and Congcong Wu

The buried pipe element method can be used to calculate the temperature of mass concrete through highly efficient computing. However, in this method, temperatures along…

Abstract

Purpose

The buried pipe element method can be used to calculate the temperature of mass concrete through highly efficient computing. However, in this method, temperatures along cooling pipes and the convection coefficient of the cooling pipe boundary should be improved to achieve higher accuracy. Thus, there is a need to propose a method for improvement.

Design/methodology/approach

According to the principle of heat balance and the temperature gradient characteristics of concrete around cooling pipes, a method to calculate the water temperature along cooling pipes using the buried pipe element method is proposed in this study. By comparing the results of a discrete algorithm and the buried pipe element method, it was discovered that the convection coefficient of the cooling pipe boundary for the buried pipe element method is only related to the thermal conductivity of concrete; therefore, it can be calculated by inverse analysis.

Findings

The results show that the buried pipe element method can achieve the same accuracy as the discrete method and simulate the temperature field of mass concrete with cooling pipes efficiently and accurately.

Originality/value

This new method can improve the calculation accuracy of the embedded element method and make the calculation results more reasonable and reliable.

Details

Engineering Computations, vol. 37 no. 8
Type: Research Article
ISSN: 0264-4401

Keywords

To view the access options for this content please click here
Article

Jase R Ramsey, Livia Barakat, Matthew C. Mitchell, Thomas Ganey and Olesea Voloshin

The purpose of this paper is to provide evidence that firms that are more committed to internationalization, systematically differ from firms that are less committed to…

Abstract

Purpose

The purpose of this paper is to provide evidence that firms that are more committed to internationalization, systematically differ from firms that are less committed to internationalization in their future intention to engage in foreign direct investment (FDI). The authors analyzed data from 42 large Brazilian multinational enterprises (MNEs) and found that results support previous research on the degree of satisfaction with prior internationalization efforts and future intent to internationalize, such that the relationship between the two is positive. Yet contrary to existing literature, the degree to which a firm was committed to internationalization has a negative influence on the positive relationship between satisfaction and intent.

Design/methodology/approach

All Brazilian firms that have entered foreign markets via FDI were surveyed to measure the firm’s: intent to internationalize; satisfaction with prior internationalization; and commitment to internationalization. Intent to internationalize is future based while both satisfaction and commitment reflect previous year’s activities. The potential response pool included publically traded companies listed on the Bovespa (São Paulo Stock Exchange) and private limited companies (Ltda.). The authors conducted a hierarchical moderated regression analysis to test the moderating effect of commitment to internationalization on the relationship between international satisfaction and intent to internationalize.

Findings

This study adds to the literature by examining how past international satisfaction and commitment affect the future intent to internationalize for large Brazilian MNEs. The results confirm that the degree of past satisfaction regarding a firm’s international business is positively related to the firm’s future intent to internationalize. However, the results diverge from past research in two important ways. First, contrary to the organizational behavior literature, past commitment to internationalization does not have a significant relationship with future intention to internationalize. Second, the results show the relationship between satisfaction and intent is weakened by a high degree of international commitment.

Research limitations/implications

A limitation of this study is the small sample size. While it encompasses the vast majority of large MNEs in Brazil, the authors still do not have enough data points to test more hypotheses such as the effects of firm size, number of countries the firm is in, and age of the firm. Future studies should attempt to expand the work done here by examining these effects. Another limitation of this study is that it is based on solely one country; Brazil. Future studies should attempt to replicate these findings in other emerging market countries.

Practical implications

These results have three main managerial implications. First, international strategists analyzing the trajectory of a firm’s future intentions to internationalize should focus on how satisfied the firm has been with its past efforts. Second, managers should not assume that just because their firms have a large presence abroad that this will subsequently lead to future plans to internationalize. Finally, for emerging market MNEs in a period of the financial crises, committing more to internationalization may reduce the positive relationship between satisfaction and intention.

Originality/value

The purpose of this study is to add to the small but growing work on large MNEs from Brazil in order to better understand their internationalization strategies. While there are literally hundreds of articles investigating the individual-level relationship between satisfaction and the intent to do something, there are a dearth at the firm level (see Wood et al., 2011, as a notable exception). The authors therefore attempt to extend the literature on internationalization by discussing how satisfaction at the firm level affects a firm-level decision.

Details

International Journal of Emerging Markets, vol. 11 no. 2
Type: Research Article
ISSN: 1746-8809

Keywords

1 – 4 of 4