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Article
Publication date: 1 March 1993

M.E. Jozefowicz and N.‐C. Lee

The IPC‐SF‐818 surface insulation resistance (SIR) test data taken with the use of a variety of halide‐free, no‐clean fluxes are analysed against Bellcore TR‐NWT‐000078…

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Abstract

The IPC‐SF‐818 surface insulation resistance (SIR) test data taken with the use of a variety of halide‐free, no‐clean fluxes are analysed against Bellcore TR‐NWT‐000078 electromigration (EM) test data. Neither test results show correlation with bulk flux resistivity, flux water extract resistivity, flux residue moisture pick‐up, and flux corrosivity without bias. However, in the case of rosin fluxes, the insulation resistance behaviour in both SIR and EM tests is a function of the pH value of fluxes. This phenomenon is more significant in the SIR test. In the case of low‐residue, no‐clean fluxes, only the SIR test displays such a pH dependent relationship. Data suggest that the 50 volts bias voltage used in the SIR test may be responsible for this, and can be explained with a high‐bias‐voltage‐induced electrolysis mechanism which is further promoted by a high pH environment. This failure mechanism is absent in the EM test which utilises 10 volts bias voltage, and probably will not occur under the normal 5 volts application conditions. Overall, the SIR test seems to be more stringent while the EM test appears to be more realistic.

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Circuit World, vol. 19 no. 4
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 13 August 2020

Amir Samadi, Reza Amini, Mehran Rostami, Pooneh Kardar and Michele Fedel

The purpose of this study was to evaluate the possibility of using conductive polymers such as polyaniline (PANI) as corrosion inhibitors for metals.

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Abstract

Purpose

The purpose of this study was to evaluate the possibility of using conductive polymers such as polyaniline (PANI) as corrosion inhibitors for metals.

Design/methodology/approach

In this study, the effect of the addition of praseodymium (Pr3+) cations on the corrosion inhibition performance of PANI for AZ31 magnesium alloy was appraised through electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests.

Findings

The results of EIS and potentiodynamic polarization tests indicated the improvement of corrosion resistance of AZ31 during different immersion times.

Research limitations/implications

This anti-corrosion ability of PANI/Pr3+ composite applies as non-toxic environmentally friendly corrosion inhibitor on the self-healing corrosion protection properties.

Practical implications

The conductive polymers are interested for many industries. The reported data can be used by the formulators working in the R&D departments.

Social implications

The anti-corrosion ability of PANI/Pr3+ composite present a novel and high effective route against metal corrosion besides application of toxic corrosion.

Originality/value

The application of titanium dioxide coating in the field of architectural heritage is a great challenge. Therefore, the main objective of this study is to study the synthesis, characterization and corrosion inhibition performance of Pr3+ cations doped PANI nano-fibers as an anti-corrosion additive for AZ31 magnesium alloy in 3.5 Wt.% NaCl solution.

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Pigment & Resin Technology, vol. 50 no. 1
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 8 June 2020

Aldona Glińska-Neweś, Iwona Escher, Barbara Józefowicz and Alicja Łuka

Together with increasing ambiguity and frequency of changes, management becomes full of seemingly conflicting choices, i.e. paradoxes, coming up in the process of decision-making…

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Abstract

Purpose

Together with increasing ambiguity and frequency of changes, management becomes full of seemingly conflicting choices, i.e. paradoxes, coming up in the process of decision-making. Successful management of paradoxes, i.e. treating them as “both/and” constructs leads to innovative solutions and better overall organizational performance. In response to a significant research gap regarding antecedents of managing paradoxes, the aim of the paper is to investigate how individual characteristics of strategic decision-makers, specifically their age, tenure and educational background, affect the ability to combine contradictions in their strategic choices.

Design/methodology/approach

An empirical study was conducted among 201 managers representing furniture companies in Poland. The CATI technique with an interview questionnaire was adopted in order to identify respondents' opinions on the main features, traits and dimensions of the strategy implemented in their companies. Participants' tenure, age and education were measured by single items.

Findings

The study suggests that the ability to manage paradoxes increases with age and tenure in a company and at a current position. At the same time economic/business educational background appears to be unsupportive in this regard.

Originality/value

While the issue of managing paradoxes energizes researchers in various disciplines, we still do not know much about antecedents of the process. The study shed light on effects that managers' demographics have on their ability of managing paradoxes. It contributes to the theory on strategic paradoxes as well as theory on the influence of decision-makers' individual characteristics on their decisions.

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Journal of Organizational Change Management, vol. 33 no. 5
Type: Research Article
ISSN: 0953-4814

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Article
Publication date: 2 February 2024

Paweł Brzustewicz, Aldona Glińska-Neweś, Iwona Escher, Yusheng Fu and Barbara Józefowicz

The aim of this study is to test for a moderating role of employee participation in volunteering in links between employees' relationships with peers and supervisors, work…

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Abstract

Purpose

The aim of this study is to test for a moderating role of employee participation in volunteering in links between employees' relationships with peers and supervisors, work meaningfulness (WM) and affective commitment (AC).

Design/methodology/approach

The study is based on a survey conducted on a sample of 711 employees, both those involved and those non-involved in corporate volunteering (CV).

Findings

The results suggest that employee participation in CV strengthens the effects that employees' perceptions of positive relationships with peers and perceived supervisor support (PSS) have on employees' AC. Contrary to expectations, although participation in CV strengthens employees' sense of WM, it does not affect its links with other phenomena analyzed in this study.

Originality/value

CV is a fast-growing practice in corporate social responsibility. The reasons companies implement CV include the benefits they gain from it, such as positive effects on employee attitudes and behaviors. The paper contributes to the understanding of CV effects on employee attitudes and behaviors and builds a better business case for this CSR practice.

Details

Journal of Organizational Change Management, vol. 37 no. 1
Type: Research Article
ISSN: 0953-4814

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Article
Publication date: 22 October 2019

Suzanne Jozefowicz, Merlin Stone and Eleni Aravopoulou

The purpose of this paper is to explain the rise of geospatial data, its importance for business and some of the problems associated with its development and use.

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Abstract

Purpose

The purpose of this paper is to explain the rise of geospatial data, its importance for business and some of the problems associated with its development and use.

Design/methodology/approach

The paper reviews a certain amount of previously published literature but is based mainly on analysis of the very large number of responses to a consultation paper on geospatial data published by the UK Government.

Findings

The findings are that while there is strong appreciation of the potential benefits of using geospatial data, there are many barriers to the development, sharing and use of geospatial data, ranging from problems of incompatibility in data definitions and systems to regulatory issues. The implication for governments and for providers and users of geospatial data relates to the need to take a long-term approach to planning in resolving the issues identified.

Research limitations/implications

The research findings are limited to the UK, but similar findings would be likely in any other large Western country.

Practical implications

This paper confirms the need for a strong and coherent approach to the planning of geospatial data and systems for the establishment of a clear basis for the different parties to work together and the need to clearly separate the roles of the government in establishing frameworks and standards and the role of the private sector in developing applications and solutions.

Social implications

Society is increasingly dependent on the use of geospatial data, in improving living standards and dealing with social problems. The recommendations identified in this paper, if followed, will facilitate these improvements.

Originality/value

The value of this paper is the tight synthesis that it provides of a wide ranging and complex range of responses to the UK Government consultation and placing these responses in the wider context of the development of geospatial data.

Details

The Bottom Line, vol. 33 no. 1
Type: Research Article
ISSN: 0888-045X

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Article
Publication date: 10 August 2012

Genna R. Miller

The purpose of this paper is to explain how student‐written diaries and journals serve as a specifically feminist pedagogy for teaching feminist economics, thereby challenging the

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Abstract

Purpose

The purpose of this paper is to explain how student‐written diaries and journals serve as a specifically feminist pedagogy for teaching feminist economics, thereby challenging the lecture‐based techniques used to teach and uphold the mainstream, market‐fundamentalist paradigm.

Design/methodology/approach

The approach involves the author's observations and experiences using student‐written diaries to teach a feminist economics course.

Findings

Student‐written diaries have the potential to dislodge both the market‐fundamentalist economics paradigm and the lecture‐based teaching method that dominate the undergraduate economics curriculum. Student‐written diaries are especially useful in teaching feminist economics courses which strive to elevate women's economic status and/or to reduce the androcentric bias in economics. The paper describes how student‐written diaries are used to achieve both of these goals and to create a more inclusive classroom culture, while simultaneously challenging market fundamentalism.

Originality/value

The paper offers a new pedagogical technique to be used for teaching feminist economics courses and for countering lecture‐based courses that focus on market fundamentalism.

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Article
Publication date: 3 June 2022

Changro Lee

The success of a neural network depends on, among others, an architecture that is appropriate for the task at hand. This study attempts to identify an optimal architecture of a…

157

Abstract

Purpose

The success of a neural network depends on, among others, an architecture that is appropriate for the task at hand. This study attempts to identify an optimal architecture of a neural network in the context of property valuation, and aims to test the ability of connecting related neural networks to reduce the property valuation error.

Design/methodology/approach

This study explores efficient network architectures to estimate land and house prices in Seoul, South Korea. The input is structured data, and the embedding technique is used to process high-cardinality categorical variables.

Findings

The shared architecture of a network for simultaneous estimation of both land and houses was revealed to be the best performing network. Through weight sharing between relevant layers in networks, the root-mean-square error (RMSE) for land price estimation was reduced significantly, from 0.55–0.68 using the baseline architecture, to 0.44–0.47 using the shared architecture.

Originality/value

The study results are expected to encourage active investigation of efficient architectures by using domain knowledge, and to promote interest in using structured data, which is still the dominant type in most industries.

Details

Property Management, vol. 41 no. 1
Type: Research Article
ISSN: 0263-7472

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Article
Publication date: 24 February 2022

Khaled M.M. Koriem, Nevein N. Fadl, Salwa R. El-Zayat, Eman N. Hosny and Fatma A. Morsy

The purpose of this study was designed to investigate anise oil and geranium oil to amend body weight, serum bile acid and vitamin D, and liver histology in depressed rats.

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Abstract

Purpose

The purpose of this study was designed to investigate anise oil and geranium oil to amend body weight, serum bile acid and vitamin D, and liver histology in depressed rats.

Design/methodology/approach

Eighty male albino rats were divided into normal and depressed rats. Normal rats (40 rats) were divided into four equal groups: control, venlafaxine drug, anise oil and geranium oil groups. Depressed rats (40 rats) were divided into four equal groups: depressed rats, depressed rats + venlafaxine drug, depressed rats + anise oil and depressed rats + geranium oil groups. Body weight, food consumption and water intake were detected. Animal behavior, cerebral cortex and hippocampus neurotransmitters, serum bile acid and vitamin D and liver histology were also investigated in this study.

Findings

Body weight (117 ± 7.6 g), food consumption (5.6 ± 1.4 g/day) and water intake (8.7 ± 1.2 ml/day) were significantly decreased (p < 0.001) in depression compared to body weight (153 ± 7.6 g), food consumption (12.7 ± 1.6 g/day) and water intake (15.3 ± 1.6 ml/day) in control. Animal behavioral tests, e.g. sucrose preference (48.8 ± 1.5) test, distance traveled (70.0 ± 16.3), center square entries (0.20 ± 0.10), center square duration (52.18 ± 11.9), tail suspension (54.70 ± 2.9 s) test and forced swimming (134.4 ± 5.5 s) test were significantly decreased (p < 0.001) in depression compared to sucrose preference (89.2 ± 1.7) test, distance traveled (226 ± 90.1), center square entries (1.4 ± 1.8), center square duration (3.6 ± 2.0), tail suspension (19.3 ± 2.1 s) test and forced swimming (83.7 ± 3.6 s) test in control. Cerebral cortex and hippocampus areas neurotransmitters such as serotonin (7.4 ± 1.7 and 1.2 ± 0.54 pg/g tissue), dopamine (6.3 ± 1.5 and 0.86 ± 0.07 pg/g tissue), norepinephrine (8.1 ± 1.7 and 1.4 ± 0.41 pg/g tissue) and gamma aminobutyric acid (GABA) (1.3 ± 0.41 and 0.08 ± 0.04 µmole/g tissue), serum bile acid (46.8 ± 3.5 µmole/L) and vitamin D (1.3 ± 0.37 ng/ml) were significantly decreased (p?0.001) in depression compared to cerebral cortex and hippocampus areas neurotransmitters such as serotonin (16.8 ± 2.1 and 4.0 ± 1.4 pg/g tissue), dopamine (15.7 ± 2.0 and 1.8 ± 0.49 pg/g tissue) norepinephrine (18.2 ± 2.3 and 3.8 ± 1.3 pg/g tissue) and GABA (2.7 ± 0.62 and 0.16 ± 0.06 µmole/g tissue), serum bile acid (90.5 ± 4.3 µmole/L) and vitamin D (2.7 ± 0.58 ng/ml) in control. Depression induced injury to hepatic tissues. Oral supplementation with anise oil and geranium oil ameliorated body weight, serum bile acid and vitamin D and liver histology in depressed rats.

Originality/value

Depression treatment persists for a long time, so the search for a new herbal treatment is of concern due to available sources, cheap and no side effects of herbal plants. Anise oil and geranium oil improved body weight, food consumption, water intake, animal behavioral tests, cerebral cortex and hippocampus areas neurotransmitters, serum bile acid and vitamin D and liver histology in depression.

Details

Nutrition & Food Science , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0034-6659

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Publication date: 31 October 2012

Revathy Kumar, Nancy Seay and Jeffrey H. Warnke

This chapter examines immigrant adolescents’ personal vulnerabilities and strengths that combine in complex ways with environmental adversities and affordances to determine their…

Abstract

This chapter examines immigrant adolescents’ personal vulnerabilities and strengths that combine in complex ways with environmental adversities and affordances to determine their post-immigration developmental pathways. The challenges associated with immigrant adolescents’ transition to a U.S. school are examined within the framework of risk-protective additive, challenge and susceptibility, and the risk-protective interactive models. This transition is much more than a change of schools. It involves several transitions: (a) the cultural, relational, and physical context the adolescent leaves behind; (b) the circumstances of exit from the home country and of entry into the host country including voluntary and involuntary immigration; (c) the reception accorded to the immigrant adolescent’s family upon immigration; (d) the first place of settlement after immigration; and (e) entry into a new school with a new set of peers, teachers, behavioral norms, and school rules and expectations. The chapter addresses the various forms of immigrant adolescents’ acculturation upon relocation to the United States. These include the role of immigrant group’s social distance from mainstream society, downward assimilation, and selective acculturation. Special emphasis is placed on the relationship between immigrant adolescents’ identity negotiations, their need to belong in the new context, and the acculturation patterns they manifest. While acknowledging the importance of family resources pre- and post-immigration and the role of community resources in the United States that may ease this transition, the crucial role of schools in creating respectful, culturally responsive spaces that foster inclusion, engagement, and learning for immigrant adolescents’ successful adjustment in the new context is highlighted.

Details

Transitions Across Schools and Cultures
Type: Book
ISBN: 978-1-78190-292-9

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Article
Publication date: 31 October 2017

Anja Johnsen, Gaby Ortiz-Barreda, Guro Rekkedal and Anette Christine Iversen

The purpose of this paper is to summarise and analyse empirical research on protective factors that promote academic resilience in ethnic minority children mainly aged between 13…

348

Abstract

Purpose

The purpose of this paper is to summarise and analyse empirical research on protective factors that promote academic resilience in ethnic minority children mainly aged between 13 and 18 years attending schools in the Nordic countries.

Design/methodology/approach

This paper was opted for a literature review of 23 peer-reviewed quantitative articles published between 1999 and 2014. The analysis entailed protective factors at both the personal and environmental levels in ethnic minority children.

Findings

Some minority children’s school performance may be just as good if not better than majority children when having similar or even lower socioeconomic status than majority children. Protective factors at the personal level included working hard, having a positive attitude towards school, and having high educational aspirations. Protective factors at the environmental level included supportive school systems, supportive schools, and supportive networks including parental qualities and support. The findings are comparable to the findings outside the Nordic countries with one exception; minority children in the Nordic countries performed better than expected despite socioeconomic disadvantages.

Research limitations/implications

Protective factors affecting academic resilience need further attention in a time with an increased global migration. Research implications may be related to how schools and policy makers develop supportive school systems, supportive schools, and supportive networks to contribute to making a difference for minority children’s educational opportunities in the Nordic countries.

Originality/value

Academic resilience is a relatively new research field in the Nordic countries. This review is the first review which has summarised and analysed existing findings on academic resilience in the Nordic countries in minority children.

Details

International Journal of Migration, Health and Social Care, vol. 13 no. 4
Type: Research Article
ISSN: 1747-9894

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