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21 – 30 of 31
Article
Publication date: 18 March 2020

Farhang Djafari, Hossein Shahinfar, Maryam Safabakhsh and Sakineh Shab-Bidar

Fruits and vegetables (FVs) are a good source of substances that contributed to bone health. However, the relation of FVs consumption with inflammation and bone biomarkers is…

Abstract

Purpose

Fruits and vegetables (FVs) are a good source of substances that contributed to bone health. However, the relation of FVs consumption with inflammation and bone biomarkers is inconsistent. Thus, this paper aims to assess the association of FVs intake with inflammation and bone biomarkers in older adults.

Design/methodology/approach

This cross-sectional study was performed on 178 older adults in Tehran, with a mean age of 67.04. Biochemical measurements including serum osteocalcin, high sensitivity c-reactive protein, 25-hydroxyvitamin D 25(OH) D, parathormone and urine terminal telopeptide of Type I collagen (u-CTx) was done. The intake of FVs was calculated using a validated quantitative food frequency questionnaire.

Findings

Pearson correlation coefficients showed a positive relation between serum osteocalcin and total vegetables (r = 0.167, p = 0.026), juices group (r = 0.155, p = 0.035), starchy vegetables (r = 0.205, p = 0.006) and other vegetable group (r = 0.161, p = 0.032) even after controlling of potential confounders. Analysis of covariance showed that total vegetable were significantly associated with serum osteocalcin (p = 0.041) and PTH levels (p = 0.028). Additionally, no evidence of a significant relationship between total fruit intake and test variables was observed. However, subgroup analyses demonstrated a significant association between citrus fruits and serum 25(OH) D (p = 0.017). A significant relation between starchy vegetable and urine CTx-I was reported (p = 0.016). Moreover, other vegetable subgroup was strongly associated with serum osteocalcin (p = 0.003).

Originality/value

The results of this paper may provide insight for clinical interventions and also important to make policy for prevention or easing bone disorders and general inflammation related to fruit and vegetable intake.

Details

Nutrition & Food Science , vol. 50 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 10 May 2011

Ng Sha Shiong, Ching Chin Guan, Zainuriah Hassan and Haslan Abu Hassan

The purpose of this paper is to report the structural properties of AlxGa1−xN (0≤x≤1) grown on sapphire substrate by means of X‐ray diffraction (XRD) technique. The main purpose…

Abstract

Purpose

The purpose of this paper is to report the structural properties of AlxGa1−xN (0≤x≤1) grown on sapphire substrate by means of X‐ray diffraction (XRD) technique. The main purpose of this work was to investigate the effects of Al(x) composition to the structural and microstructural properties of AlxGa1−xN ternary alloy such as the crystalline quality, crystalline structure and lattice constant c.

Design/methodology/approach

AlxGa1−xN thin films with wurtzite structure in the composition range of 0≤x≤1 are used in this study. The compositions of the samples are calculated using Vegard's law and verified by energy dispersive X‐ray analysis. The samples are then characterized by means of XRD rocking curve (RC) and phase analysis.

Findings

Investigation revealed that the full width half maximum (FWHM) of RC increase with the increase x value. This indicates that the crystalline quality of the samples deteriorate with the increase of Al compositions. The best fit of the non‐linear interpolation of the FWHM of the (002) diffraction RC data suggested that a maximum disorder should be expected in this mixed crystals system when the composition x≈45 percent.

Originality/value

This paper provides valuable information on the effect of Al compositions to the structural characteristics of AlxGa1−xN alloy system. The availability of information about maximum disorder of Al composition in AlxGa1−xN (0≤x≤1) alloy system provides useful reference in device fabrications where researchers are able to choose correct alloy composition in order to fabricate good quality devices.

Details

Microelectronics International, vol. 28 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 26 April 2013

Maryam Amirhoseiny, Zainuriah Hassan and Sha Shiong Ng

The purpose of this paper was to investigate the growth dependence of InN on Si substrate with different orientation through RF reactive magnetron sputtering in ambient…

Abstract

Purpose

The purpose of this paper was to investigate the growth dependence of InN on Si substrate with different orientation through RF reactive magnetron sputtering in ambient temperature.

Design/methodology/approach

The authors fabricated indium nitride (InN) thin films by radio frequency (RF) sputtering. The InN thin films were deposited on Si (100), Si (110) and Si (111) substrates at room temperature. The crystalline structure and surface morphology of the InN films were characterized by X‐ray diffraction (XRD), scanning electron microscope (SEM), energy‐dispersive X‐ray spectroscopy (EDX) and atomic force microscopy (AFM).

Findings

X‐ray diffraction results revealed that the wurtzite InN with preferential (101) orientation are deposited. Through the Scherrer structural analysis revealed nanocrystalline structure for InN films grown on Si (110), Si (100) and Si (111) orientation with crystallite size of 42.3, 33.8 and 24.1, respectively. The optical properties of InN layers were examined by Fourier transform infrared (FTIR) and micro‐Raman reflectance spectroscopy at room temperature. The observation of the E1(TO), A1(LO), and E2(high) phonon modes of the InN from the IR and Raman results confirmed that the deposited InN thin film has hexagonal structure.

Originality/value

Si (110) surface is not isotropic and it may offer a unique orientation plane for the nitride films which could reduce the defect density and the resulting tensile stress responsible for film cracking. Therefore, it is absolutely worth exploring the growth of InN on Si (110) by using relatively simple and cheap reactive sputtering technique.

Article
Publication date: 10 February 2023

Jinghua Xu, Mingzhe Tao, Mingyu Gao, Shuyou Zhang, Jianrong Tan, Jingxuan Xu and Kang Wang

The coupling impact of hybrid uncertain errors on the machine precision is complex, as a result of which the designing method with multiple independent error sources under…

Abstract

Purpose

The coupling impact of hybrid uncertain errors on the machine precision is complex, as a result of which the designing method with multiple independent error sources under uncertainties remains a challenge. For the purpose of precision improvement, this paper focuses on the robot design and aims to present an assembly precision design method based on uncertain hybrid tolerance allocation (UHTA), to improve the positioning precision of the mechanized robot, as well as realize high precision positioning within the workspace.

Design/methodology/approach

The fundamentals of the parallel mechanism are introduced first to implement concept design of a 3-R(4S) &3-SS parallel robot. The kinematic modeling of the robot is carried out, and the performance indexes of the robot are calculated via Jacobian matrix, on the basis of which, the 3D spatial overall workspace can be quantified and visualized, under the constraints of limited rod, to avoid the singular position. The error of the robot is described, and a probabilistic error model is hereby developed to classify the hybrid error sensitivity of each independent uncertain error source by Monte Carlo stochastic method. Most innovatively, a methodology called UHTA is proposed to optimize the robot precision, and the tolerance allocation approach is conducted to reduce the overall error amplitude and improve the robotized positioning precision, on the premise of not increasing assembly cost.

Findings

The proposed approach is validated by digital simulation of medical puncture robot. The experiment highlights the mathematical findings that the horizontal plane positioning error of the parallel robotic mechanism can be effectively reduced after using UHTA, and the average precision can be improved by up to 39.54%.

Originality/value

The originality lies in UHTA-based precision design method for parallel robots. The proposed method has widely expanding application scenarios in industrial robots, biomedical robots and other assembly automation fields.

Article
Publication date: 16 January 2019

Liliane Bonnal, Pascal Favard and Kady Marie-Danielle Sorho-Body

This paper is the first of its kind to look at first-year undergraduates in France. The purpose of this paper is to measure the impact of holding down a job on the probability of…

Abstract

Purpose

This paper is the first of its kind to look at first-year undergraduates in France. The purpose of this paper is to measure the impact of holding down a job on the probability of students dropping out of higher education or passing their first year.

Design/methodology/approach

Given the existence of relevant unobserved explanatory variables, probit models with two simultaneous equations have been estimated. The first equation will enable us to explain paid employment or working hours, and the second academic outcomes that allow for dropout.

Findings

The results show that being employed means students are more likely to drop out during their first year and less likely to pass. The latter finding is comparable with results for subsequent academic years although the impact is greater for first-year undergraduates. The more intensive the work, the greater the adverse effects of employment.

Originality/value

By refining the research, this negative impact of employment is not verified for all the student profiles. For some of them, e.g., those with honours at the secondary bachelor, employment does not harm their academic results.

Details

International Journal of Manpower, vol. 40 no. 4
Type: Research Article
ISSN: 0143-7720

Keywords

Article
Publication date: 14 January 2014

Ahmad Mashayekhi, Ali Nahvi, Mojtaba Yazdani, Majid Mohammadi Moghadam, Mohammadreza Arbabtafti and Mohsen Norouzi

This paper aims to present the design and implementation of VirSense, a novel six-DOF haptic interface system, with an emphasis on its gravity compensation and fixed-base motors…

Abstract

Purpose

This paper aims to present the design and implementation of VirSense, a novel six-DOF haptic interface system, with an emphasis on its gravity compensation and fixed-base motors.

Design/methodology/approach

In this paper, the design and manufacture of the VirSense robot and its comparison with the existing haptic devices are presented. The kinematic analysis of the robot, design of the components, and manufacturing of the robot are explained as well.

Findings

The proposed system is employed to generate a Virtual Sense (VirSense) with fixed-base motors and a spring compensation system for counterbalancing the torques generated by the weight of the links. The fixed bases of the motors reduce the system's effective mass and inertia, which is an important factor in haptic interface systems. A novel cabling system is used to transmit the motor torques to the end-effector. The spring-based gravity compensation system causes more reduction in the effective mass and inertia.

Originality/value

This paper provides the details of the VirSense haptic device, its gravity compensation system, and a novel cabling power transmission.

Details

Industrial Robot: An International Journal, vol. 41 no. 1
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 8 May 2018

Juan Guio, Álvaro Choi and Josep-Oriol Escardíbul

The purpose of this paper is to provide a better understanding of the links between labor market conditions and academic performance by disentangling the effects of unemployment…

Abstract

Purpose

The purpose of this paper is to provide a better understanding of the links between labor market conditions and academic performance by disentangling the effects of unemployment. The contribution of this study is, therefore, threefold: first, it provides new evidence on the link between labor market conditions and educational decisions; second, it quantifies separately the two separate effects of unemployment on academic performance at age 15; and third, it analyses heterogeneous effects of the “family” and “local labor market” – proxied through the unemployment rate of the school community – effects.

Design/methodology/approach

The analysis of the impact of unemployment on academic performance is performed through hierarchical linear regressions.

Findings

The results show that academic performance at age 15 is affected by labor market conditions, and, at the same time, previous performance determines future educational decisions. Thus, these results highlight the sensitivity of students’ educational decisions and academic performance to shifts in the labor market.

Practical implications

This suggests that strategies aimed at reducing early school dropout rates should not be restricted solely to the education system. In other words, school failure is not only dependent on schools and, hence, on education policies.

Originality/value

This paper contributes to the existing literature by providing new evidence on the relationship between short-term labor market dynamics and academic performance. More specifically, this paper represents a significant step forward in comparison to the previous literature as it has provided responses to three key questions faced by countries with high unemployment and high early school dropout.

Details

International Journal of Manpower, vol. 39 no. 2
Type: Research Article
ISSN: 0143-7720

Keywords

Article
Publication date: 19 June 2009

Norliza Katuk, Ku Ruhana Ku‐Mahamud, Norita Norwawi and Safaai Deris

The purpose of this paper is to present the utilization of a web‐based support system for flood response operation in Malaysia. The system is intentionally designed to improve…

2290

Abstract

Purpose

The purpose of this paper is to present the utilization of a web‐based support system for flood response operation in Malaysia. The system is intentionally designed to improve process and data management towards providing prompt and effective response to victims.

Design/methodology/approach

The implementation of the research adopted the knowledge acquisition method for implementing expert systems in organizations. The methodology consists of four phases of activities which are planning for knowledge acquisition, knowledge extraction, knowledge analysis, and knowledge verification.

Findings

The findings include the architecture of the web‐based support system for flood response operation which is presented in the form of conceptual and software models. The architecture of web‐based support systems for flood response operation can assist the flood management related agencies in managing and maintaining data related to floods. It also allows them to monitor the current situation of flood‐related matters.

Practical implications

Web‐based support systems for flood response operation is expected to improve the overall aspect of flood response operation by providing electronic features which facilitate the flood response process and data management. In future, expert systems for flood response operations is one of the enhancements to the current architecture.

Originality/value

This paper presents the architecture of a web‐based support system for flood response operation in Malaysia. The proposed architecture is beneficial for the flood management related agencies in order to plan further improvements in the current procedure for flood response.

Details

Disaster Prevention and Management: An International Journal, vol. 18 no. 3
Type: Research Article
ISSN: 0965-3562

Keywords

Open Access
Article
Publication date: 2 September 2021

Andrew Healey, Alexandra Melaugh, Len Demetriou, Tracey Power, Nick Sevdalis, Megan Pritchard and Lucy Goulding

Many patients referred by their GP for an assessment by secondary mental health services are unlikely to ever meet eligibility thresholds for specialist treatment and support. A…

1490

Abstract

Purpose

Many patients referred by their GP for an assessment by secondary mental health services are unlikely to ever meet eligibility thresholds for specialist treatment and support. A new service was developed to support people in primary care. “the authors evaluate” whether the phased introduction of the Lambeth Living Well Network (LWN) Hub to a population in south London led to: a reduction in the overall volume of patients referred from primary care for a secondary mental health care assessment; and an increase in the proportion of patients referred who met specialist service eligibility criteria, as indicated by the likelihood of being accepted in secondary care.

Design/methodology/approach

The evaluation applied a quasi-experimental interrupted time series design using electronic patient records data for a National Health Service (NHS) provider of secondary mental health services in south London.

Findings

Scale-up of the Hub to the whole of the population of Lambeth led to an average of 98 fewer secondary care assessments per month (95% CI −118 to −78) compared to an average of 203 assessments per month estimated in the absence of the Hub; and an absolute incremental increase in the probability of acceptance for specialist intervention of 0.20 (95% CI; 0.14 to 0.27) above an average probability of acceptance of 0.57 in the absence of the Hub.

Research limitations/implications

Mental health outcomes for people using the service and system wide-service impacts were not evaluated preventing a more holistic evaluation of the effectiveness and cost-effectiveness of the LWN Hub.

Practical implications

Providing general practitioners with access to service infrastructure designed to help people whose needs cannot be managed within specialist mental health services can prevent unnecessary referrals into secondary care assessment teams.

Social implications

Reducing unnecessary referrals through provision of a primary-care linked mental health service will reduce delay in access to professional support that can address specific mental-health related needs that could not be offered within the secondary care services and could prevent the escalation of problems.

Originality/value

The authors use NHS data to facilitate the novel application of a quasi-experimental methodology to deliver new evidence on whether an innovative primary care linked mental health service was effective in delivering on one of its key aims.

Details

Mental Health Review Journal, vol. 26 no. 4
Type: Research Article
ISSN: 1361-9322

Keywords

Open Access
Article
Publication date: 2 November 2021

Rabha W. Ibrahim

In this study, the authors introduce a solvability of special type of Langevin differential equations (LDEs) in virtue of geometric function theory. The analytic solutions of the…

Abstract

Purpose

In this study, the authors introduce a solvability of special type of Langevin differential equations (LDEs) in virtue of geometric function theory. The analytic solutions of the LDEs are considered by utilizing the Caratheodory functions joining the subordination concept. A class of Caratheodory functions involving special functions gives the upper bound solution.

Design/methodology/approach

The methodology is based on the geometric function theory.

Findings

The authors present a new analytic function for a class of complex LDEs.

Originality/value

The authors introduced a new class of complex differential equation, presented a new technique to indicate the analytic solution and used some special functions.

Details

Arab Journal of Mathematical Sciences, vol. 29 no. 1
Type: Research Article
ISSN: 1319-5166

Keywords

21 – 30 of 31