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Article
Publication date: 1 December 1943

William Schroeder and Thomas H. Hazlett

THE modern aeroplane is constructed largely from sheet metal. As such, the most important production problems are those of sheet metal forming, and assembling. Production is here…

170

Abstract

THE modern aeroplane is constructed largely from sheet metal. As such, the most important production problems are those of sheet metal forming, and assembling. Production is here considered as not only the act of forming and assembling the required number of parts, but also the making of forming tools, and all processing of parts such as heat‐treating. Only that phase of the above concept of production which deals with the tooling for production and the forming and heat‐treating will be considered here. The design of the aircraft parts will also be discussed somewhat, for it is obvious that the design of the part (designed shape and materials used) frequently determines whether the part can or cannot be readily made.

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Aircraft Engineering and Aerospace Technology, vol. 15 no. 12
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 4 February 2022

Yuqian Zhou, Gongbing Bi, Jiancheng Lv and Hongping Li

This paper aims to develop an optimal buyback promotion strategy for enterprises, including multibuyback strategy and self-buyback strategy, taking both the consumer's…

271

Abstract

Purpose

This paper aims to develop an optimal buyback promotion strategy for enterprises, including multibuyback strategy and self-buyback strategy, taking both the consumer's multichannel psychological acquisition attributes and remaining market into account.

Design/methodology/approach

Based on the game theory and Hotelling model, the authors formulate a new model to study the equilibrium of different buyback models, given the utility maximization of the consumers, the profit maximization and the constraint on nondecreasing market share of the enterprises, and the authors conduct comparative analysis.

Findings

Intuitively, enterprises buying back products of other brands would appeal to some consumers. However, the authors find that after implementing the multibuyback scheme, enterprises may not be able to seize competitors' markets or even lose their original customer base in the context considered in this article counterintuitive. In addition, the size of remaining market share and the consumer's multichannel psychological acquisition affect the choice of buyback promotion strategies. Moreover, after implementing multibuyback scheme, customers with old products subsidize those who receive additional discounts. Finally, the authors point out that the buyback strategy choices of companies with different goal-oriented are diverse.

Practical implications

This study has a very solid realistic background and provides guidance for enterprises to implement buyback promotion strategies. In addition, the authors unearth new influencing factors to provide a reasonable explanation for different buyback strategies in reality.

Originality/value

To the best of the authors’ knowledge, this study is one of the first to explore the multibuyback promotion strategy as a new buyback method, where the two influencing factors the authors have not been proposed so far.

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Book part
Publication date: 21 October 2014

Abstract

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Politics and the Life Sciences: The State of the Discipline
Type: Book
ISBN: 978-1-78441-108-4

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Publication date: 20 May 2017

Hope Corman, Dhaval M. Dave, Ariel Kalil and Nancy E. Reichman

This study investigates the effects of a broad-based policy change that altered maternal employment, family income, and other family characteristics on drug-related crime among…

Abstract

This study investigates the effects of a broad-based policy change that altered maternal employment, family income, and other family characteristics on drug-related crime among youth. Specifically, we exploit differences in the implementation of welfare reform in the United States across states and over time in the attempt to identify causal effects of welfare reform on youth arrests for drug-related crimes between 1990 and 2005, the period during which welfare reform unfolded. We use monthly arrest data from the U.S. Federal Bureau of Investigation’s Uniform Crime Reports to estimate the effects of welfare reform implementation on drug-related arrests among 15- to 17-year-old teens exposed to welfare reform. The findings, based on numerous different model specifications, suggest that welfare reform had no statistically significant effect on teen drug arrests. Most estimates were positive and suggestive of a small (3%) increase in arrests.

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Human Capital and Health Behavior
Type: Book
ISBN: 978-1-78635-466-2

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Book part
Publication date: 21 October 2014

Odelia Funke

Abstract

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Politics and the Life Sciences: The State of the Discipline
Type: Book
ISBN: 978-1-78441-108-4

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Book part
Publication date: 15 November 2018

Jill Weigt

The Personal Responsibility Work Opportunity and Reconciliation Act of 1996, better known as Welfare Reform, implemented, in addition to many other features, a 60-month lifetime…

Abstract

The Personal Responsibility Work Opportunity and Reconciliation Act of 1996, better known as Welfare Reform, implemented, in addition to many other features, a 60-month lifetime limit for welfare receipt. Research to date primarily documents individual-level barriers, characteristics, and outcomes of those who time out. Very little scholarly work considers experiences of mothering or carework after timing out. In this chapter, I ask, what kinds of carework strategies are used by women who have met their lifetime limits to welfare? What do the ways mothers talk about these strategies tell us about the discursive forces they are resisting and/or engaging? Using in-depth interviews at two points in time with women who have timed out of welfare (n = 32 and 23), this analysis shows how mothers’ strategies and the ways they discuss them reveal covert material and symbolic resistance to key discourses – negative assumptions about welfare mothers and a culture of work enforcement – and the conditions shaping their lives (Hollander & Einwohner, 2004). Mothers use carework strategies very similar to those identified in many other studies (e.g., London, Scott, Edin, & Hunter, 2004; Morgen, Acker, & Weigt, 2010; Scott, Edin, London, & Mazelis, 2001), but they provide us with an understanding of carework in a new context. The three groups of strategies explored here – structuring employment and non-employment, protecting children, and securing resources – reveal raced, classed, and gendered labor in which women engage to care for children in circumstances marked by limited employment opportunities and limited state support. The policy implications of mothers’ strategies are also discussed.

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Marginalized Mothers, Mothering from the Margins
Type: Book
ISBN: 978-1-78756-400-8

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Available. Content available

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Clinical Governance: An International Journal, vol. 16 no. 3
Type: Research Article
ISSN: 1477-7274

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Article
Publication date: 21 May 2024

Kesavan Devarayan, Deepika Anandakumar Muthurani, Geetha Kannusamy, Anand Theivasigamani, Yazhiniyan Palanisamy, Gangeswar Mohan, Monikandon Sukumaran, Evon Umesh Siluvai John, Ramar Marimuthu and Hema Anjappan

This study aims to describe on-site determination of pH in aquaculture using a portable colorimeter.

11

Abstract

Purpose

This study aims to describe on-site determination of pH in aquaculture using a portable colorimeter.

Design/methodology/approach

A basic and inexpensive portable colorimeter having light sources of different wavelength has been optimized for the determination of pH. A chromic reagent is optimized to develop colors depending on different pHs. Then, the color is measured using portable colorimeter in terms of resistance. Using the resistance to absorbance relationship, the resistance values are converted to absorbance. The performance of the developed colorimetric system is compared with commercially available colorimeter and pH meter. Eighty brackish water aquaculture samples were tested using the developed colorimetric system to check its adaptability in aquaculture farms.

Findings

A chromic reagent optimized in this study exhibited linear relationship with the pH changes of pH standards. Portable colorimeter having three different light sources is optimized using this chromic agent for determination of pH. Colorimeter possessing yellow light revealed more linear results than the others. The developed colorimetric system determines the pH of aquaculture water with an accuracy of ±0.14 in comparison with commercial colorimeter at the pH range of 6.0−9.0.

Originality/value

pH plays a pivotal role in aquaculture, impacting not only productivity but also profitability. The colorimetric system introduced in this research is promising for pH measurement in the field of brackish water aquaculture. The on-site pH assessment facilitated by this colorimetric system holds significant potential for adoption within the aquaculture sector, owing to its precision, portability, simplicity of use and user-friendly nature.

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Pigment & Resin Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 April 2004

Juan Onésimo Sandoval

This article examines the impact of the 1996 welfare‐to‐work law on women’s work and welfare outcomes. I investigate four welfare and work outcomes: (1) off welfare and employed;…

555

Abstract

This article examines the impact of the 1996 welfare‐to‐work law on women’s work and welfare outcomes. I investigate four welfare and work outcomes: (1) off welfare and employed; (2) off welfare and unemployed; (3) on welfare and employed; and (4) on welfare and unemployed. I compare how women on welfare move into these different categories from 1990 to 2000, with specific interest in examining what happened to the number of women in these categories after 1996, which is the bench mark year to examine the impact of the 1996 welfare‐to‐work law. In this article I will investigate four questions: (1) are long‐term welfare users permanently leaving welfare?; (2) is there a group of welfare users that permanently left welfare before the 1996 welfare‐to‐work law? (3) is there a hard‐to‐serve welfare population?; and (4) are those women that leave welfare finding employment. I draw four conclusions from my analyses. My first conclusion is that a new group of welfare users emerged after 1996 that is different than the conventional three groups (e.g., long‐term users, short‐term users, and recidivists). I call this new group PRWORA leavers, which are long‐term welfare users that have permanently left the welfare rolls after 1996. My second conclusion is that a group of welfare users permanently left the welfare rolls before 1996. Thus, many women were already leaving welfare and finding work be fore the law was passed. My third conclusion is that there remains a consistent hard‐to‐serve population on welfare. However, this group of welfare users is small. My fourth conclusion is that work participation has significant in creased from 1996 to 2000 for long‐term welfare users.

Details

Equal Opportunities International, vol. 23 no. 3/4/5
Type: Research Article
ISSN: 0261-0159

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Article
Publication date: 15 October 2019

Bhuvaneshwari Durvas Seshian, Bothi Raja Pandian and Umapathi Durai

The purpose of this study is to develop green/natural corrosion inhibitors. Adina cordifolia leaves extract (ACLE) was screened for its corrosion inhibition potential for mild…

143

Abstract

Purpose

The purpose of this study is to develop green/natural corrosion inhibitors. Adina cordifolia leaves extract (ACLE) was screened for its corrosion inhibition potential for mild steel (MS) corrosion in 0.5 M H2SO4 medium.

Design/methodology/approach

Adina cordifolia (AC) leaves were subjected to cold ethanol extraction and concentrated after refluxed with double distilled water. The resultant concentrate was screened for corrosion inhibition studies using sequence of standard corrosion monitoring techniques, namely, gravimetric analysis, electrochemical studies and scanning electron microscopy (SEM).

Findings

Gravimetric analysis provided evidence that the prepared ACLE showed dose dependent corrosion inhibition; impedance study revealed that the ACLE increases the charge transfer resistance and decreases double layer capacitance while polarization curves indicated that ACLE acts as a mixed-type inhibitor. Further studies over MS surface/test solutions through SEM and Fourier-Transform Infrared spectroscopy evident the formation of ACLE protective film protects MS.

Practical implications

AC’s methanol extract developed in this work can be used as a green corrosion inhibitor over industrial applications.

Originality/value

For the first time, AC leaves were tested as corrosion inhibitors for MS corrosion in 0.5 M H2SO4 medium. The results evidenced that ACLE will be a promising corrosion inhibitor, which could be usable in industries as a green corrosion inhibitor.

Details

Pigment & Resin Technology, vol. 49 no. 1
Type: Research Article
ISSN: 0369-9420

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