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1 – 10 of over 100000
Article
Publication date: 5 October 2010

Yongrong Wang, Peihua Zhang, Xunwei Feng and Yuan Yao

The paper aims to develop a system and measuring method for investigating the dynamic pressure behavior of compression garments.

Abstract

Purpose

The paper aims to develop a system and measuring method for investigating the dynamic pressure behavior of compression garments.

Design/methodology/approach

The dynamic pressure behavior measurement, realized by use of the self‐designed system, is a direct measuring method, which is based on a rigid hemisphere with five pressure sensors distributed on its surface. The dynamic pressure is measured over time under the process of fabric 3D deformation. The pressure distributions at the basic five sites are accepted as the measuring results. The dynamic stiffness index can be calculated from dynamic pressure profile and 3D deformation of compression garments.

Findings

The measuring system records the pressure‐time curve and pressure‐deformation curve. The dynamic pressure stiffness index expresses the change in pressure owing to the change in elongation of compression fabrics. The pressure measuring system and the index provide much information in the field of compression garment assessment.

Research limitations/implications

Another characteristic that was not mentioned but important is pressure hysteresis, which can give the information about pressure decay when fabrics undergoing repeated stretch and relaxation. The influence factors of hysteresis and its role in compression garments also requires further research.

Originality/value

To determine and characterize the dynamic pressure behavior of compression garment under 3D deformation, this study develops a measuring system and defines a new index. The measuring system can be used in scientific research institutes and factories, contribute to optimize process parameters and quality control of compression garment.

Details

International Journal of Clothing Science and Technology, vol. 22 no. 5
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 2 January 2018

Maman Setiawan and Alfons G.J.M. Oude Lansink

The purpose of this paper is to investigate the relation between industrial concentration and technical inefficiency in the Indonesian food and beverages industry using a dynamic

Abstract

Purpose

The purpose of this paper is to investigate the relation between industrial concentration and technical inefficiency in the Indonesian food and beverages industry using a dynamic performance measure (dynamic technical inefficiency) that accounts for the presence of adjustment costs.

Design/methodology/approach

This research uses panel data of 44 subsectors in the Indonesian food and beverages industry for the period 1980-2014. The dynamic input directional distance function is applied to estimate the dynamic technical inefficiency. Further, the Granger causality between industrial concentration and dynamic technical inefficiency is tested using a dynamic panel data model. A bootstrap truncated regression model is finally applied to estimate the relation between industrial concentration and dynamic technical inefficiency based on the results from the Granger causality test.

Findings

The results show that the Indonesian food and beverages industry has a high dynamic technical inefficiency. Investigation of the causality of the relation shows that industrial concentration has a positive effect on dynamic technical inefficiency at the subsector level, with no reversed causality. The results suggest that the quiet life hypothesis applies to the Indonesian food and beverages industry.

Originality/value

The literature investigating the relation between industrial concentration and performance relies on static measures of performance, such as technical efficiency. Static measures provide an incorrect metric of the firms’ performance in the presence of adjustment costs associated with investment. Therefore, this research has a contribution in measuring dynamic technical inefficiency that accounts for the presence of the adjustment cost as well as its relation with industrial concentration in the Indonesian food and beverages industry.

Details

British Food Journal, vol. 120 no. 1
Type: Research Article
ISSN: 0007-070X

Keywords

Book part
Publication date: 1 August 2004

Crystal B Howard and H.Lee Swanson

This chapter reviews some of our most recent research as to whether the cognitive performance of reading disabled and poor readers can be separated under dynamic assessment…

Abstract

This chapter reviews some of our most recent research as to whether the cognitive performance of reading disabled and poor readers can be separated under dynamic assessment procedures. We describe results related to junior high school students (mean chronological age of 12 years) with reading disabilities, poor readers, and skilled readers. Students were administered intelligence, reading and math tests, and working memory (WM) measures (presented under static and dynamic testing conditions). The results thus far show that: (1) dynamic assessment measures (maintenance scores) contributed unique variance to predicting reading; and (2) poor readers and skilled readers were more likely to change and maintain gains under the dynamic testing conditions than students with reading disabilities. Some discussion was given to developing a valid classification of reading disabilities.

Details

Research in Secondary Schools
Type: Book
ISBN: 978-0-76231-107-1

Article
Publication date: 1 July 2006

Bhagyashree Paranjape, Margaret Rossiter and Victor Pantano

The purpose of this paper is to evaluate Balanced Scorecard by listing claims made by its authors and counterclaims made by other scholars/authors; to justify further research for

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Abstract

Purpose

The purpose of this paper is to evaluate Balanced Scorecard by listing claims made by its authors and counterclaims made by other scholars/authors; to justify further research for answering the question “how to measure” in a broad manner; and to justify further research in “dynamic performance measurement systems for global organisations”.

Design/methodology/approach

By referencing relevant literature, this paper first evaluates Balanced Scorecard. In its second part, the problems associated with designing and implementing performance measures are listed and lack of research in dynamic performance measurement systems for global organisations is brought to attention. The third part emphasises the need for further research to address the issues mentioned in part two.

Findings

The literature reveals that Balanced Scorecard still prevails as the dominant performance measurement system. Successful implementations, however, are much less prevalent and translating Balanced Scorecard to concrete action is still a problematic area.

Research limitations/implications

A vast, multidisciplinary volume of literature is available on performance measurement. This review has referenced mostly recent (2000‐2005) literature.

Practical implications

This review provides a reference for academics/practitioners by listing and organising major claims made by authors of Balanced Scorecard and counterclaims made by other authors/scholars. This review also brings to notice the difficulties associated with designing and implementing measures, identifying opportunities for ongoing research.

Originality/value

This paper forms the basis for a new research direction that considers global organisations and explores the design of a dynamic performance measurement system that operates within an integrated framework of business processes.

Details

Measuring Business Excellence, vol. 10 no. 3
Type: Research Article
ISSN: 1368-3047

Keywords

Article
Publication date: 23 March 2012

Alfin Leo, Gino Rinaldi, Ion Stiharu and Rama Bhat

It is currently difficult to measure temperature and pressure in harsh environments. Such measurements are limited by either the ability of the sensing element or the associated…

Abstract

Purpose

It is currently difficult to measure temperature and pressure in harsh environments. Such measurements are limited by either the ability of the sensing element or the associated electrical wiring to withstand the operating environment. This is unfortunate as temperature and pressure are important measurands in various engineering structures as they provide critical information on the operating condition of the structure. Hence, there is a need to address this shortcoming. Such a sensor in place would enhance the operating efficiency thereby reducing the pollution burden and its impact on the environment. The purpose of this paper is to present theoretical and preliminary experimental results for a co‐integrated pressure and temperature sensor for harsh environments.

Design/methodology/approach

This work describes a co‐integrated pressure‐temperature wireless sensing scheme. The approach presented herein provides the possibility of measuring dynamic pressure and temperature within an enclosed volume using acoustic signals. Resonance tube physics is exploited for the temperature sensing. A microphone is used to obtain the acoustic signal whose frequency is a function of the temperature and the tube geometry.

Findings

The dynamic pressure is measured from the calibrated amplitude of the pressure wave signal measured by the microphone. The temperature can be measured through the shift of the standing wave frequency with a resolution of <1°C. The resonance tube can be fabricated using any material that resists harsh environments. The geometry of the tube can be tailored for any specific frequency range, as the application warrants. Also, this provides a means for accurate temperature compensation of pressure sensor data from high temperature environments. A Matlab/Simulink model is developed and presented for the acquisition of acoustic signals through the wall of an enclosed volume. For these applications the standing wave signal transmitted through the enclosure wall becomes a function of the wall material and wall thickness. Preliminary experimental results are presented in which a DC fan is used for generating the dynamic pressure in a varying temperature environment.

Research limitations/implications

The major issue is the separation of the noise from the signal. As various applications yield specific signal noise, the problem needs detailed data to be addressed.

Practical implications

Temperature and dynamic pressure could be recorded/monitored in very harsh environment conditions such as chemical reactors.

Originality/value

This work demonstrates the possibility of employing a co‐integrated acoustic sensing scheme in which both pressure and temperature are measured simultaneously with a sole sensor. The major advantage with acoustic sensing is the wireless transmission of data. This allows for non‐invasive measurement from within enclosed systems. Direct real‐time temperature compensation is possible that does not require any compensation circuitry. Hence, pressure and temperature data may be obtained from caustic operating environments whose access is otherwise not feasible.

Article
Publication date: 25 October 2019

Khalid Hussain, Fengjie Jing, Muhammad Junaid, Farasat Ali Shah Bukhari and Huayu Shi

The purpose of this paper is to suggest that the effects of service quality (SQ) on outcome variables may shift over time. However, scant attention has been paid to capturing that…

Abstract

Purpose

The purpose of this paper is to suggest that the effects of service quality (SQ) on outcome variables may shift over time. However, scant attention has been paid to capturing that shift. The current study uses the theory of relationship dynamics to capture the rate and direction of change in the effects of SQ attributes on customer satisfaction (CS) and emotional attachment (EA). For this purpose, the study takes CS-velocity and EA-velocity as dynamic outcomes of SQ.

Design/methodology/approach

A sample of 306 restaurant consumers responded to a structured questionnaire at three points in time. Confirmatory factor analysis was carried out, followed by analysis of the data through latent growth curve modeling using MPlus (Version 8.1).

Findings

SQ attributes positively affect CS and EA, but these effects diminish over time, as SQ attributes negatively influence CS-velocity and EA-velocity. In addition, the study demonstrates that dynamic elements strongly impact behavioral intentions (BI).

Practical implications

The study enables service and relationship marketing managers to better understand the role of SQ attributes in maintaining longitudinal satisfaction, attachment and BI. The insights from this longitudinal investigation help managers to formulate long-term service management and relationship management strategies.

Originality/value

This study is the first attempt to examine SQ’s dynamic outcomes using longitudinal panel data. It is the first study to introduce EA-velocity as a dynamic construct of EA and the first to examine the relationships of CS-velocity and EA-velocity with BI.

Details

Journal of Service Theory and Practice, vol. 29 no. 4
Type: Research Article
ISSN: 2055-6225

Keywords

Article
Publication date: 26 September 2023

Murat Demir and Gonca Balci Kilic

The purpose of this study is to explore the effect of stitch type and stitch direction on the dynamic drape behavior of the woven fabric.

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Abstract

Purpose

The purpose of this study is to explore the effect of stitch type and stitch direction on the dynamic drape behavior of the woven fabric.

Design/methodology/approach

In this paper, the effectiveness of stitch type and stitch directions on dynamic drape behaviors were investigated. Fabric parts were sewn together with two types of the stitch (lockstitch and overlock stitch) on three different stitch directions (warp, weft and bias (45°)). The static drape coefficients (SDC) of unsewn and sewn fabrics were measured according to the image process method. Dynamic drape coefficients (DDC) of fabrics were also measured using the same method at six different (25, 50, 75, 100, 125, 150 rpms) rotation speeds. Additionally, bending length and bending rigidity were measured using the Cantilever test method.

Findings

Experimental results showed that stitch type and stitch directions are effective on the dynamic drape behaviors of the fabric. Overlock stitch resulted in greater DDC than the lock stitch. For both of the stitch type, DDC for the stitch on the warp direction are greater than the stitch on the weft and bias direction for all speeds. In addition, bending length, hence the bending rigidity, are greater for overlock stitch type and always weft direction resulted in greater than the warp and bias direction.

Originality/value

Fabric drape is vital for garment appearance and is gaining popularity with the advancement of virtual technology, enabling virtual visualization of garments. While previous studies have predominantly examined either the static or dynamic drape behavior of individual fabric panels, or solely focused on the static drape behavior of sewn fabrics, this study acknowledges the significance of incorporating the influence of stitch type and direction on dynamic drape behaviors. Considering that fabrics are sewn together to create garments and that DDC provides a more accurate representation of real-time fabric behavior compared to SDC, this research makes a valuable contribution to the existing literature by investigating the impact of stitch type and direction specifically on DDC.

Details

International Journal of Clothing Science and Technology, vol. 35 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 7 November 2016

Kaixuan Liu, Jianping Wang, Chun Zhu and Yan Hong

Currently, the researches on garment development and wear comfort evaluation mainly focus on the static condition type and seldom involved dynamic condition. Therefore, the…

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Abstract

Purpose

Currently, the researches on garment development and wear comfort evaluation mainly focus on the static condition type and seldom involved dynamic condition. Therefore, the purpose of this paper is to develop cycling clothes’ patterns and evaluate their dynamic wear comfort.

Design/methodology/approach

First, the 3D-to-2D flattening technology was applied to develop garment patterns of a cycler’s jersey T-shirt. Then, 3D animation technology was used to simulate the scene of cycling. Next, a novel pressure-measuring method was proposed to measure static and dynamic clothing pressures in a virtual environment. Finally, the collected data were used for evaluating wear comfort.

Findings

Compared to static conditions, the dynamic wear comfort noticeably improved at the front neck, side neck, upper front chest, around back neck point and front shoulder, and the front neck. Compared to static conditions, the dynamic wear comfort visibly deteriorates at the back neck, below chest, outseam, back except around back neck point and around scapula, and the around scapula area. The dynamic pressure at back neck, below front chest and shoulder fluctuate wildly throughout the whole cycling. On the contrary, the dynamic pressure at the front neck, side neck, front upper chest and at the back cause it to tend to stability during cycling.

Originality/value

The 3D virtual-reality technology was applied to simulate cycling. And a novel method was proposed to measure numerical clothing pressures for evaluating the dynamic wear comfort. The proposed method can not only quantitatively evaluate the wear comfort of cycling clothes and optimize cycling clothes’ patterns, but also can be applied to other tight garment types.

Details

International Journal of Clothing Science and Technology, vol. 28 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 10 January 2024

Tingwei Gu, Shengjun Yuan, Lin Gu, Xiaodong Sun, Yanping Zeng and Lu Wang

This paper aims to propose an effective dynamic calibration and compensation method to solve the problem that the statically calibrated force sensor would produce large dynamic

Abstract

Purpose

This paper aims to propose an effective dynamic calibration and compensation method to solve the problem that the statically calibrated force sensor would produce large dynamic errors when measuring dynamic signals.

Design/methodology/approach

The dynamic characteristics of the force sensor are analyzed by modal analysis and negative step dynamic force calibration test, and the dynamic mathematical model of the force sensor is identified based on a generalized least squares method with a special whitening filter. Then, a compensation unit is constructed to compensate the dynamic characteristics of the force measurement system, and the compensation effect is verified based on the step and knock excitation signals.

Findings

The dynamic characteristics of the force sensor obtained by modal analysis and dynamic calibration test are consistent, and the time and frequency domain characteristics of the identified dynamic mathematical model agree well with the actual measurement results. After dynamic compensation, the dynamic characteristics of the force sensor in the frequency domain are obviously improved, and the effective operating frequency band is widened from 500 Hz to 1,560 Hz. In addition, in the time domain, the rise time of the step response signal is reduced from 0.29 ms to 0.17 ms, and the overshoot decreases from 26.6% to 9.8%.

Originality/value

An effective dynamic calibration and compensation method is proposed in this paper, which can be used to improve the dynamic performance of the strain-gauge-type force sensor and reduce the dynamic measurement error of the force measurement system.

Details

Sensor Review, vol. 44 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 21 September 2022

Yujie Zhang, Wenchao Niu and Bin Li

Structural stress and strain in the key components of aircraft structure is important for structural health monitoring and strength assessment. However, the measure of dynamic

Abstract

Purpose

Structural stress and strain in the key components of aircraft structure is important for structural health monitoring and strength assessment. However, the measure of dynamic strain is often difficult to implement because of the complex test equipment and inconvenient measure points, especially in flight test. This study aims to propose an algorithm of dynamic strain estimation using the acceleration response in time domain to simplify the measure of dynamic strain.

Design/methodology/approach

The relationship between the strain and acceleration response is established through the sinusoidal response or modal analysis, which is insensitive to the excitation position and form. A band-pass filter is used to obtain the modal acceleration response, and a filter frequency band selection method is proposed. Then, the dynamic strain at the concerned points can be estimated based on the modal superposition principle.

Findings

Simulation and experiment are implemented to validate the applicability and effectiveness of the strain estimation method. The estimated strain results agree well with numerical simulation as well as the experimental results. The simplicity and accuracy of the strain estimation method show practicability for dynamic strength and fatigue analysis in engineering applications.

Originality/value

An algorithm of dynamic strain estimation using the acceleration response in time domain is developed. A band-pass filter is used to obtain the modal acceleration response, and a filter frequency band selection method is proposed. The dynamic strain at the concerned points can be estimated based on the modal superposition principle.

Details

Aircraft Engineering and Aerospace Technology, vol. 95 no. 4
Type: Research Article
ISSN: 1748-8842

Keywords

1 – 10 of over 100000