scholarly journals Konka Board: a cement-pumice-tow sheathing board

2021 ◽  
Vol 18 ◽  
pp. 108-116
Author(s):  
Nigel Isaacs
Keyword(s):  
Model Building ◽  
Cellulose Fibre ◽  
Natural Fibre ◽  
First Century ◽  
Reinforced Composite ◽  
Labour Costs ◽  
Asbestos Cement ◽  
Fibre Cement ◽  
The 1960S ◽  
Manufacturing Time

Konka board was a New Zealand invention which combined cement, pumice and flax fibre ("tow") into a fibre-cement board, replacing the imported asbestos-cement sheet. Sold soon after manufacture, Konka, it could be nailed or screwed, and over time it hardened. A waterproof plain or stucco plaster finish provided a resilient, borer proof, fireproof, low maintenance house. Three patents created the Konka system – 34,845 for the fibre-reinforced board, 37,354 for the stud and support system into which a concrete grout was poured to lock the panels in place, and finally 52,50 for metal strips to ensure a smooth final plaster surface. A waterproofing additive in the plaster provided the final part of the system.The company quickly setup a national series of agents, with manufacturing ultimately occurring in Wanganui, Gisborne, Christchurch and Timaru. Patent 34,845 was challenged in 1927, with the Privy Council finding in 1930 that it was invalid, opening the way for similar products to be made. The development in the 1930s of NZSS 95 Model Building By-law allowed Konka to be used nationally, without further evidence as to its performance. However, competitor other products were also included e.g. Excell, Rotorua, Thermax, Duro, Wangan, Walasco and the asbestos based Fibrolite.Konka survived until the 1960s, when flax production was in decline, the high labour costs and manufacturing time meant it was no longer competitive. Even so, in a twist of fate it was a Konka style approach which led to cellulose fibre replacing asbestos in fibre-cement sheeting. In the twenty-first century, Konka could even be considered a desirable product – a natural fibre reinforced, composite sheet.

The Revival of Quantification: Reflections on Old New Histories

2021 ◽  
Vol 45 (1) ◽  
pp. 1-25
Author(s):  
Steven Ruggles
Keyword(s):  
Twentieth Century ◽  
Social History ◽  
Economic History ◽  
Historical Analysis ◽  
The United States ◽  
First Century ◽  
Third Wave ◽  
Late Twentieth ◽  
The 1960S ◽  
Second Wave

AbstractQuantitative historical analysis in the United States surged in three distinct waves. The first quantitative wave occurred as part of the “New History” that blossomed in the early twentieth century and disappeared in the 1940s and 1950s with the rise of consensus history. The second wave thrived from the 1960s to the 1980s during the ascendance of the New Economic History, the New Political History, and the New Social History, and died out during the “cultural turn” of the late twentieth century. The third wave of historical quantification—which I call the revival of quantification—emerged in the second decade of the twenty-first century and is still underway. I describe characteristics of each wave and discuss the historiographical context of the ebb and flow of quantification in history.

Black Men and Black Masculinity

2021 ◽  
Vol 47 (1) ◽  
pp. 437-457
Author(s):  
Alford A. Young
Keyword(s):  
Black Men ◽  
Social Relations ◽  
Black Males ◽  
Black Masculinity ◽  
First Century ◽  
Criminal Justice Systems ◽  
Male Experience ◽  
The 1960S ◽  
New Research ◽  
Sociological Studies

In recent decades, sociological studies of black males and of black masculinity in America unfolded with great rapidity. In the 1960s, sociological studies of black males gained currency. Much of their focus has been on the problematic state of black males in education, employment, family life, peer and social relations, and within criminal justice systems. That tradition moved from employing a social problems lens for researching black men to documenting how their efforts in these and other spheres of life reflect creativity and efficacy as much as malaise and despair. Emerging several decades later in sociology, black masculinity studies began with an emphasis on how black males contended with hegemonic masculinity. This tradition moved to explore how sexual, socioeconomic, and other variations in the black male experience elucidated vulnerability as a common feature of that experience, as well as to more extensive visions of black masculinity. New research questions stand before both traditions that constitute the twenty-first-century agenda.

India and Global Governance

2010 ◽  
Author(s):  
Poorvi Chitalkar ◽  
David M. Malone
Keyword(s):  
International Relations ◽  
Global Governance ◽  
First Century ◽  
Climate Change Negotiations ◽  
Economic Diplomacy ◽  
Meaningful Participation ◽  
Tremendous Progress ◽  
Un Security Council ◽  
1960S And 1970S ◽  
The 1960S

India’s engagement with the institutions and norms of global governance has evolved significantly since independence in 1947. This chapter traces the evolution—beginning with early engagement with international organizations under Nehru, to the waning of its enthusiasm for multilateralism in the 1960s and 1970s, and its struggle for greater voice and recognition internationally in the twenty-first century. Through the prism of its quest for a permanent seat in the UN Security Council, its approach to climate change negotiations, global economic diplomacy, and its engagement with global norms, this chapter traces India’s rise as a vital player in the rebalancing of international relations in a multipolar world. However, despite its tremendous progress, some ongoing challenges continue to constrain India’s meaningful participation in global governance at times. The chapter concludes with an assessment of India’s contribution to global governance and its prospects as a stakeholder and shareholder on the global stage.

scholarly journals MECHANICAL TESTING OF NEW NATURAL FIBRE REINFORCED COMPOSITE MATERIAL

2021 ◽  
Vol Special (June) ◽  
pp. 29-39
Author(s):  
Ravi Prakash Sharma ◽  
Jitendra Dixit ◽  
Abhijeet Jaiswal ◽  
Nalin Sharma
Keyword(s):  
Composite Material ◽  
Mechanical Testing ◽  
Natural Fibre ◽  
Reinforced Composite ◽  
Reinforced Composite Material

Conclusion

2017 ◽  
Author(s):  
Pamela E. Pennock
Keyword(s):  
United States ◽  
The United States ◽  
American Identity ◽  
First Century ◽  
Arab Americans ◽  
Arab American ◽  
Muslim Americans ◽  
Politics And Culture ◽  
1960S And 1970S ◽  
The 1960S

As we approach the third decade of the twenty-first century, the United States continues to wrestle with defining its role in Middle East conflicts and fully accepting and fairly treating Arab and Muslim Americans. In this contentious and often ill-informed climate, it is crucial to appreciate the struggles, priorities, and accomplishments of Arab Americans over the past several decades, both what has set them apart and what has integrated them into the politics and culture of the United States. Arab American organizing in the environment of minority rights movements in the 1960s and 1970s fostered a heightened consciousness of and pride in Arab American identity....

Back to Work

2018 ◽  
pp. 213-224
Author(s):  
Joseph R. Fitzgerald
Keyword(s):  
New York ◽  
Young People ◽  
First Century ◽  
Wall Street ◽  
Student Activists ◽  
For Profit ◽  
Not For Profit ◽  
The 1960S ◽  
The City

The final chapter briefly touches on Richardson’s second divorce but focuses on her difficulties finding and keeping employment. After holding a series of jobs in various corporate and not-for-profit agencies, Richardson eventually earned a permanent civil service position with the City of New York, where she worked until the twenty-first century. In one way or another, all her jobs involved some kind of social justice. Over the last five decades, Richardson has paid close attention to social change movements, including Occupy Wall Street and Black Lives Matter, and this chapter discusses her thoughts about them, particularly her view that young people have the capability and vision to lead the nation to greater freedom, just as young people did in the 1960s. She advises them to replicate the group-centered and member-driven model student activists employed in the early 1960s and to avoid becoming ideological.

U.S. Environmental Policy and Politics: From the 1960s to the 1990s

2000 ◽  
Vol 12 (1) ◽  
pp. 17-42 ◽  
Author(s):  
Michael E. Kraft
Keyword(s):  
Environmental Policy ◽  
Environmental Policies ◽  
The United States ◽  
Political Conflict ◽  
First Century ◽  
Political Agenda ◽  
The Past ◽  
Policy Goals ◽  
Policies And Programs ◽  
The 1960S

Environmental policy and politics in the United States have changed dramatically over the past three decades. What began in the late 1960s as an heroic effort by an incipient environmental movement to conserve dwindling natural resources and prevent further deterioration of the air, water, and land has been transformed over more than three decades into an extraordinarily complex, diverse, and often controversial array of environmental policies. Those policies occupy a continuing position of high visibility on the political agenda at all levels of government, and environmental values are widely embraced by the American public. Yet throughout the 1990s environmental policies and programs were characterized as much by sharp political conflict as by the consensus over policy goals and means that reigned during the early to mid-1970s. As the twenty-first century approaches, there is considerable value in looking back at this exceptional period to under-stand the nature of the transformation and its implications for the future.

scholarly journals Natural Fibre-Reinforced Biofoams

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Anne Bergeret ◽  
Jean Charles Benezet
Keyword(s):  
Mechanical Properties ◽  
Cellulose Fibre ◽  
Fibre Surface ◽  
Natural Fibre ◽  
Void Content ◽  
Blowing Agent ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Density Reduction ◽  
Screw Extrusion

Starches and polylactic acids (PLAs) represent the main biobased and biodegradable polymers with potential industrial availability in the next decades for “bio” foams applications. This paper investigates the improvement of their morphology and properties through processing and materials parameters. Starch foams were obtained by melt extrusion in which water is used as blowing agent. The incorporation of natural fibres (hemp, cellulose, cotton linter, sugarcane, coconut) in the starch foam induced a density reduction up to 33%, a decrease in water absorption, and an increase in mechanical properties according to the fibre content and nature. PLA foams were obtained through single-screw extrusion using of a chemical blowing agent that decomposed at the PLA melting temperature. A void content of 48% for PLA and 25% for cellulose fibre-reinforced PLA foams and an improvement in mechanical properties were achieved. The influence of a fibre surface treatment was investigated for both foams.

Environmental Threat I

2017 ◽  
Author(s):  
Robert B. Archibald
Keyword(s):  
Higher Education ◽  
First Century ◽  
Student Debt ◽  
Middle Income ◽  
Higher Education System ◽  
Tuition Discounting ◽  
Environmental Threat ◽  
Education Industry ◽  
The 1960S ◽  
Higher Education Industry

Changes in the American income distribution since the 1970s are a major source of turbulence in the higher education industry. Family incomes at the bottom of the distribution have not grown since the 1960s, while family incomes at the top have soared. For families in the middle- and upper-middle-income groups, incomes have been flat in the twenty-first century. We show how this sea change in inequality helps fuel the increase in tuition discounting, the rise in student debt, and the separation of the higher education system into well-resourced institutions for the haves and poorly financed institutions for the have-nots.

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