title: A new attraction-detachment model for explaining flow sliding in clay-rich tephras

authors: Kluger, Max O.

abstract: Altered pyroclastic (tephra) deposits are highly susceptible to landsliding, leading to fatali-ties and property damage every year. Halloysite, a low-activity clay mineral, is commonly associated with landslide-prone layers within altered tephra successions, especially in depos-its with high sensitivity, which describes the post-failure strength loss. However, the precise role of halloysite in the development of sensitivity, and thus in sudden and unpredictable landsliding, is unknown. Here we show that an abundance of mushroom cap–shaped (MCS) spheroidal halloysite governs the development of sensitivity, and hence proneness to landslid-ing, in altered rhyolitic tephras, North Island, New Zealand. We found that a highly sensitive layer, which was involved in a flow slide, has a remarkably high content of aggregated MCS spheroids with substantial openings on one side. We suggest that short-range electrostatic and van der Waals interactions enabled the MCS spheroids to form interconnected aggre-gates by attraction between the edges of numerous paired silanol and aluminol sheets that are exposed in the openings and the convex silanol faces on the exterior surfaces of adjacent MCS spheroids. If these weak attractions are overcome during slope failure, multiple, weakly attracted MCS spheroids can be separated from one another, and the prevailing repulsion between exterior MCS surfaces results in a low remolded shear strength, a high sensitivity, and a high propensity for flow sliding. The evidence indicates that the attraction-detachment model explains the high sensitivity and contributes to an improved understanding of the mechanisms of flow sliding in sensitive, altered tephras rich in spheroidal halloysite.

text: A new attraction-detachment model for explaining flow sliding in clay-rich tephras Altered pyroclastic (tephra) deposits are highly susceptible to landsliding, leading to fatali-ties and property damage every year. Halloysite, a low-activity clay mineral, is commonly associated with landslide-prone layers within altered tephra successions, especially in depos-its with high sensitivity, which describes the post-failure strength loss. However, the precise role of halloysite in the development of sensitivity, and thus in sudden and unpredictable landsliding, is unknown. Here we show that an abundance of mushroom cap–shaped (MCS) spheroidal halloysite governs the development of sensitivity, and hence proneness to landslid-ing, in altered rhyolitic tephras, North Island, New Zealand. We found that a highly sensitive layer, which was involved in a flow slide, has a remarkably high content of aggregated MCS spheroids with substantial openings on one side. We suggest that short-range electrostatic and van der Waals interactions enabled the MCS spheroids to form interconnected aggre-gates by attraction between the edges of numerous paired silanol and aluminol sheets that are exposed in the openings and the convex silanol faces on the exterior surfaces of adjacent MCS spheroids. If these weak attractions are overcome during slope failure, multiple, weakly attracted MCS spheroids can be separated from one another, and the prevailing repulsion between exterior MCS surfaces results in a low remolded shear strength, a high sensitivity, and a high propensity for flow sliding. The evidence indicates that the attraction-detachment model explains the high sensitivity and contributes to an improved understanding of the mechanisms of flow sliding in sensitive, altered tephras rich in spheroidal halloysite.

year: 2017-02-01

title: A framework for bibliographic recommendation system based on Heterogeneous Retrieval Model?

authors: Anthony, Poonam

subjects: Recommendation System

abstract: In this paper, we propose an architectural framework for recommending heterogeneous resources in a digital library.We present an outline of our proposed recommendation framework, and discuss brie its performance over SpringerNature SciGraph¹ dataset.

text: A framework for bibliographic recommendation system based on Heterogeneous Retrieval Model? In this paper, we propose an architectural framework for recommending heterogeneous resources in a digital library.We present an outline of our proposed recommendation framework, and discuss brie its performance over SpringerNature SciGraph¹ dataset.

year: 2018

title: Patricia Grace's Tu: Reading the novel of indigenous insight

authors: Mahuika, Joel Rupert

subjects: Patricia

abstract: This thesis centres on Patricia Grace’s novel Tu, which is a fictional story based on historical facts, namely 1940s New Zealand and Italy, the 28th Māori Battalion and World War Two. The title of the thesis research is Patricia Grace’s Tu: Reading the novel for indigenous insight. Therefore, the major research question is what are the indigenous insights portrayed in Patricia Grace’s novel Tu?
Analysis of Grace’s Tu seeks to flesh out indigenous insights of, for example, the novel’s characters, a sense of place like land and identity, inner conflict in the form of psychological and emotional issues, trauma and many other aspects that portray Māori (the indigenous people of Aotearoa New Zealand) perspectives.

Grace’s novel Tu was produced with, among other resources, the aid of a memoir manuscript written by a 28th Māori Battalion captain, called Aku Korero. Together with Grace’s most recent and biographical book Ned and Katina: A True Love Story, are the two primary sources. Ned and Katina: A True Love Story is the journal account of a 28th Māori Battalion soldier’s experience on the island of Crete during World War Two.

Selected renowned Native American authors of fiction and non-fiction will have their stories compared with Grace’s novel to check for similarities or differences of aboriginal nations’ perspectives with those of Māori. One aspect of this thesis is to research what impacts indigenous insight may have on Māori and autochthonous American peoples’ identities and culture in countries colonised by hegemonic European settlers.

Major themes conveyed in Grace’s Tu and Ned and Katina: A True Love Story will include whānau (family) and whenua (land). Their importance to indigenous insight will be revealed in this thesis.

An interview with author, Patricia Grace, will determine what Māori perceptions she portrayed in her fictional novel. A conclusion will be formed based on evidence the data shows about indigenous insight in Grace’s Tu.

text: Patricia Grace's Tu: Reading the novel of indigenous insight This thesis centres on Patricia Grace’s novel Tu, which is a fictional story based on historical facts, namely 1940s New Zealand and Italy, the 28th Māori Battalion and World War Two. The title of the thesis research is Patricia Grace’s Tu: Reading the novel for indigenous insight. Therefore, the major research question is what are the indigenous insights portrayed in Patricia Grace’s novel Tu?
Analysis of Grace’s Tu seeks to flesh out indigenous insights of, for example, the novel’s characters, a sense of place like land and identity, inner conflict in the form of psychological and emotional issues, trauma and many other aspects that portray Māori (the indigenous people of Aotearoa New Zealand) perspectives.

Grace’s novel Tu was produced with, among other resources, the aid of a memoir manuscript written by a 28th Māori Battalion captain, called Aku Korero. Together with Grace’s most recent and biographical book Ned and Katina: A True Love Story, are the two primary sources. Ned and Katina: A True Love Story is the journal account of a 28th Māori Battalion soldier’s experience on the island of Crete during World War Two.

Selected renowned Native American authors of fiction and non-fiction will have their stories compared with Grace’s novel to check for similarities or differences of aboriginal nations’ perspectives with those of Māori. One aspect of this thesis is to research what impacts indigenous insight may have on Māori and autochthonous American peoples’ identities and culture in countries colonised by hegemonic European settlers.

Major themes conveyed in Grace’s Tu and Ned and Katina: A True Love Story will include whānau (family) and whenua (land). Their importance to indigenous insight will be revealed in this thesis.

An interview with author, Patricia Grace, will determine what Māori perceptions she portrayed in her fictional novel. A conclusion will be formed based on evidence the data shows about indigenous insight in Grace’s Tu.

year: 2015