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Influence

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Articles 1 - 30 of 44

Full-Text Articles in Physical Sciences and Mathematics

The Influence Of Place Attachment On Farmers’ Succession Plans: A Mixed Methods Study, M. E. Burbach, S. M. Kennedy, S. J. Kunert Jan 2023

The Influence Of Place Attachment On Farmers’ Succession Plans: A Mixed Methods Study, M. E. Burbach, S. M. Kennedy, S. J. Kunert

School of Natural Resources: Faculty Publications

No abstract provided.


Influence Of Irrigation On Diurnal Mesoscale Circulations: Results From Grainex, C. Phillips, R. Mahmood, R. Pielke Sr. Jan 2022

Influence Of Irrigation On Diurnal Mesoscale Circulations: Results From Grainex, C. Phillips, R. Mahmood, R. Pielke Sr.

School of Natural Resources: Faculty Publications

No abstract provided.


Pivot Points In Bivariate Linear Regression, David L. Farnsworth, Carl V. Lutzer Jun 2021

Pivot Points In Bivariate Linear Regression, David L. Farnsworth, Carl V. Lutzer

Articles

There are little-noticed points in the plane, which are artifacts of linear regression. The points, which are called pivot points, are the intersections of sets of regression lines. We derive the coordinates of the pivot point and explain its sources. We show how a pivot point arises in a certain notable data set, which has been analyzed often for points of high leverage. We obtain the application of pivot points that shortens calculations when updating a set of bivariate observations by adding a new point.


Influence, Information And Team Outcomes In Large Scale Software Development, Subhajit Datta Dec 2019

Influence, Information And Team Outcomes In Large Scale Software Development, Subhajit Datta

Research Collection School Of Computing and Information Systems

It is widely perceived that the egalitarian ecosystems of large scale open source software development foster effective team outcomes. In this study, we question this conventional wisdom by examining whether and how the centralization of information and influence in a software development team relate to the quality of the team's work products. Analyzing data from more than a hundred real world projects that include development activities over close to a decade, involving 2000+ developers, who collectively resolve more than two hundred thousand defects through discussions covering more than six hundred thousand comments, we arrive at statistically significant evidence indicating that …


Measuring Influence On Linear Dynamical Networks, Jaekob Chenina Jul 2019

Measuring Influence On Linear Dynamical Networks, Jaekob Chenina

Theses and Dissertations

Influence has been studied across many different domains including sociology, statistics, marketing, network theory, psychology, social media, politics, and web search. In each of these domains, being able to measure and rank various degrees of influence has useful applications. For example, measuring influence in web search allows internet users to discover useful content more quickly. However, many of these algorithms measure influence across networks and graphs that are mathematically static. This project explores influence measurement within the context of linear time invariant (LTI) systems. While dynamical networks do have mathematical models for quantifying influence on a node-to-node basis, to the …


Impact Of Attractiveness And Influence Of Information On Cascade Size Distribution, Dong Jian, Bin Chen, Liu Liang, Chuan Ai, Zhang Fang, Xiaogang Qiu Jan 2019

Impact Of Attractiveness And Influence Of Information On Cascade Size Distribution, Dong Jian, Bin Chen, Liu Liang, Chuan Ai, Zhang Fang, Xiaogang Qiu

Journal of System Simulation

Abstract: The distribution of the cascade size can capture the distribution of popularity of a social network. Numerous studies have shown that the cascade size distribution follows fat-tail distributions, including power-law distribution and bimodal distribution; The underlying characteristic of this highly skewed distribution lacks quantitative experimental analysis. Based on the heterogeneous stochastic information dissemination model, namely the SVRF model, this paper examines the impact of the information attractiveness and influence on the cascade size distribution through lots of computational experiments. We find that when the mean value of the information influence and attractiveness is small, the cascade sizes follow …


Simulating And Modelling Opinion Dynamics, Jennifer Heermance Jan 2019

Simulating And Modelling Opinion Dynamics, Jennifer Heermance

Graduate Research Theses & Dissertations

The foundation of social media is conversation. Social media allows people to share ideas and opinions, as well as discuss those opinions. A point of intrigue for many social scientists is how those opinions change through interaction with others. What influences someone’s opinion? When is a person willing to adapt their opinion, and when does it remain the same? Is it possible to measure these opinion dynamics? Our overall goal is to develop a more comprehensive model for opinion dynamics. The first step of this process is to simulate data that can then be analyzed and used to develop a …


Influence Of Biopolymer Loading On The Physiochemical And Electrochemical Properties Of Inherently Conducting Polymer Biomaterials, Paul J. Molino, Peter C. Innis, Michael J. Higgins, Robert M. I Kapsa, Gordon G. Wallace Jan 2015

Influence Of Biopolymer Loading On The Physiochemical And Electrochemical Properties Of Inherently Conducting Polymer Biomaterials, Paul J. Molino, Peter C. Innis, Michael J. Higgins, Robert M. I Kapsa, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

The physicochemical and electrochemical properties of polypyrrole (PPy) doped with the biological dopant dextran sulphate (DS) were shown to be significantly altered as a function of varying the salt concentration (0.2, 2 or 20 mg/ml) in the polymerisation electrolyte. Films grown in the presence of 0.2 mg/ml DS generated the highest potential during galvanostatic growth, with the potential decreasing with each subsequent increase in DS concentration. The electroactivity of the polymers was similar for all three DS concentrations, with the 20 mg/ml film drawing slightly more current upon reduction in PBS. Increasing the DS concentration reduced film interfacial roughness and …


Social Correlation In Latent Spaces For Complex Networks, Freddy Chong Tat Chua Feb 2014

Social Correlation In Latent Spaces For Complex Networks, Freddy Chong Tat Chua

Dissertations and Theses Collection (Open Access)

This dissertation addresses the subject of measuring social correlation among users within a complex social network. Social correlation is closely related to the measurement of social influence in social sciences. While social influence focuses on the existence of causal influence among users, we take a computational approach to measure correlation strength among users based on their shared interactions. We call this social correlation. To formally model social correlation, we propose a framework which contains two major parts. The first part is that of representing users behavior in a computationally efficient and accurate manner. For example, social media users perform many …


Influence Of Capping On The Atomistic Arrangement In Palladium Nanoparticles At Room Temperature, Gaston Corthey, Jimena A. Olmos-Asar, Gilberto Casillas, Marcelo M. Mariscal, Sergio Mejia-Rosales, Julio C. Azcarate, Eduardo Larios, Miguel Jose-Yacaman, Roberto Salvarezza, M Fonticelli Jan 2014

Influence Of Capping On The Atomistic Arrangement In Palladium Nanoparticles At Room Temperature, Gaston Corthey, Jimena A. Olmos-Asar, Gilberto Casillas, Marcelo M. Mariscal, Sergio Mejia-Rosales, Julio C. Azcarate, Eduardo Larios, Miguel Jose-Yacaman, Roberto Salvarezza, M Fonticelli

Australian Institute for Innovative Materials - Papers

The role that protecting molecules have on the way that palladium atoms arrange themselves in nanoparticles prepared at room temperature was studied by the analysis of aberration-corrected scanning transmission electron microscopy images and atomistic Langevin dynamics simulations. It was found that the arrangement of Pd atoms is less ordered in thiolate-protected nanoparticles than in amine-protected ones. The experimental and theoretical data showed that the disorder in ∼3 nm thiolate-protected particles is promoted by the strong S-Pd bond in the sulfide layer that surrounds the nanoparticles.


Magnetic Properties Of Ho2fe17-Xmnx - Influence Of Mn Substitution, Jianli Wang, Stewart J. Campbell, A J Studer, S J. Kennedy, Rong Zeng Jul 2013

Magnetic Properties Of Ho2fe17-Xmnx - Influence Of Mn Substitution, Jianli Wang, Stewart J. Campbell, A J Studer, S J. Kennedy, Rong Zeng

Jianli Wang

The structural and magnetic properties of Ho2Fe17−xMnx (x=0-5) have been investigated by x-ray diffraction, Mössbauer spectroscopy and DC magnetization measurements (0-5 T) over the temperature range 4.5-350 K. Similar to other ferrimagnetic R2Fe17-xMnx systems, the unit cell volume generally increases with Mn content other than for low Mn values where a slight maximum is detected around x ∼ 0.5. The nature of the magnetic phase transitions around TC is shown by Arrot plot analysis to be second order for all samples. The Curie temperature remains essentially unchanged …


Influence Of The Iron Sheath On The Local Supercurrent Distribution In Mgb2 Wires, Marie Roussel, Alexey V. Pan, Sihai Zhou, S X. Dou Jun 2013

Influence Of The Iron Sheath On The Local Supercurrent Distribution In Mgb2 Wires, Marie Roussel, Alexey V. Pan, Sihai Zhou, S X. Dou

Shi Xue Dou

The magnetic behavior of iron sheathed magnesium diboride (MgB2) wires was investigated. Global magnetization measurements have shown unusual critical current density variations compare to a superconductor with no magnetic environment. Local quantitative studies, through MO images, are linked to these global magnetization measurements in order to better understand the observed results. It is shown that the current distribution is affected by the soft magnetic sheath interacting with the superconducting core.


The Influence Of Prescribed Fire On The Extent Of Wildfire In Savanna Landscapes Of Western Arnhem Land, Australia, Owen F. Price, Jeremy Russell-Smith, Felicity Watt Jan 2012

The Influence Of Prescribed Fire On The Extent Of Wildfire In Savanna Landscapes Of Western Arnhem Land, Australia, Owen F. Price, Jeremy Russell-Smith, Felicity Watt

Faculty of Science - Papers (Archive)

Fire regimes in many north Australian savanna regions are today characterised by frequent wildfires occurring in the latter part of the 7-month dry season. A fire management program instigated from 2005 over 24 000 km2 of biodiversity-rich Western Arnhem Land aims to reduce the area and severity of late dry-season fires, and associated greenhouse gas emissions, through targeted early dry-season prescribed burning. This study used fire history mapping derived mostly from Landsat imagery over the period 1990-2009 and statistical modelling to quantify the mitigation of late dry-season wildfire through prescribed burning. From 2005, there has been a reduction in mean …


The Influence Of Sediment Particle Size And Organic Carbon On Toxicity Of Copper To Benthic Invertebrates In Oxic/Suboxic Surface Sediments, David Strom, Stuart L. Simpson, Graeme E. Batley, Dianne F. Jolley Jan 2011

The Influence Of Sediment Particle Size And Organic Carbon On Toxicity Of Copper To Benthic Invertebrates In Oxic/Suboxic Surface Sediments, David Strom, Stuart L. Simpson, Graeme E. Batley, Dianne F. Jolley

Faculty of Science - Papers (Archive)

The use of sediment quality guidelines to predict the toxicity of metals in sediments is limited by an inadequate understanding of exposure pathways and by poor causal links between exposure and effects. For a 10-d exposure to Cu-spiked sediments, toxicity to the amphipod Melita plumulosa was demonstrated to occur through a combination of dissolved and dietary Cu exposure pathways, but for the bivalves Spisula trigonella and Tellina deltoidalis, toxicity occurred primarily by exposure to dissolved Cu. For relatively oxidized sediments that had moderate amounts of organic carbon (2.6-8.3% OC), silt (20-100%


Twitterrank: Finding Topic-Sensitive Influential Twitterers, Jianshu Weng, Ee Peng Lim, Jing Jiang, Qi He Feb 2010

Twitterrank: Finding Topic-Sensitive Influential Twitterers, Jianshu Weng, Ee Peng Lim, Jing Jiang, Qi He

Research Collection School Of Computing and Information Systems

This paper focuses on the problem of identifying influential users of micro-blogging services. Twitter, one of the most notable micro-blogging services, employs a social-networking model called "following", in which each user can choose who she wants to "follow" to receive tweets from without requiring the latter to give permission first. In a dataset prepared for this study, it is observed that (1) 72.4% of the users in Twitter follow more than 80% of their followers, and (2) 80.5% of the users have 80% of users they are following follow them back. Our study reveals that the presence of "reciprocity" can …


Grading Practice Influence On The Value Of An Assigned Grade, Carrie Bala Jan 2010

Grading Practice Influence On The Value Of An Assigned Grade, Carrie Bala

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This article presents results of a study of grading practice influence on the value of an assigned grade. The value of an assigned grade, as an indication of student achievement of learning goals, was measured using the Utah Criterion-Referenced Test (CRT) in the subjects of Geometry and Algebra 2. The grading policies of six mathematics teachers at the same high school were categorized according to grading practice and their combined 587 students' scores on the Utah CRT were collected and analyzed. The findings suggest that certain grading practices , such as the use of a 1-4 scale and a criterion-referenced …


Magnetic Properties Of Ho2fe17-Xmnx - Influence Of Mn Substitution, Jianli Wang, Stewart J. Campbell, A J Studer, S J. Kennedy, Rong Zeng Jan 2010

Magnetic Properties Of Ho2fe17-Xmnx - Influence Of Mn Substitution, Jianli Wang, Stewart J. Campbell, A J Studer, S J. Kennedy, Rong Zeng

Australian Institute for Innovative Materials - Papers

The structural and magnetic properties of Ho2Fe17−xMnx (x=0-5) have been investigated by x-ray diffraction, Mössbauer spectroscopy and DC magnetization measurements (0-5 T) over the temperature range 4.5-350 K. Similar to other ferrimagnetic R2Fe17-xMnx systems, the unit cell volume generally increases with Mn content other than for low Mn values where a slight maximum is detected around x ∼ 0.5. The nature of the magnetic phase transitions around TC is shown by Arrot plot analysis to be second order for all samples. The Curie temperature remains essentially unchanged …


Sex Ratio Of Breeding Common Toads (Bufo Bufo) - Influence Of Survival And Skipped Breeding, Jon Loman, Thomas R. Madsen Jan 2010

Sex Ratio Of Breeding Common Toads (Bufo Bufo) - Influence Of Survival And Skipped Breeding, Jon Loman, Thomas R. Madsen

Faculty of Science - Papers (Archive)

Anuran sex ratio at breeding sites is typically male biased. Such sex ratios may be due to poor female survival, to females not breeding as frequently as males and/or to males becoming sexually mature earlier than females. In the present study, the first two factors are analyzed in a common toad (Bufo bufo) population in southern Sweden. Toads were captured, marked and recaptured at the breeding site during 5 years. Within season capture patterns were analyzed using the Jolly-Seber model and among-year captures using the Closed robust design model. Population estimates of males and females yielded an among year variation …


Influence Of Polyunsaturated Fatty Acids On Intestinal Barrier Function During Colitis, Bianca Knoch, Warren C. Mcnabb, Nicole Roy Jan 2010

Influence Of Polyunsaturated Fatty Acids On Intestinal Barrier Function During Colitis, Bianca Knoch, Warren C. Mcnabb, Nicole Roy

Faculty of Science - Papers (Archive)

Tight junction proteins are important for intestinal homeostasis. They prevent paracellular transport of large molecules and maintain cell polarity. Impaired tight junction function leads to a more permeable intestinal epithelial barrier and therefore potentially increases disease risk. Limited information is available concerning the effects of food components on the intestinal barrier, particularly paracellular permeability and tight junction proteins. In vitro studies with intestinal epithelial cells and in vivo studies using animal models have demonstrated that dietary n-3 and n-6 polyunsaturated fatty acids (PUFAs), particularly n-3, can reduce intestinal inflammation and permeability. PUFAs can induce transcriptional regulators which may act in …


Larval Settlement Preference Of A Native Bivalve: The Influence Of An Invasive Alga Versus Native Substrata, Paul E. Gribben, Jeffrey T. Wright, Wayne A. O'Connor, Peter Steinberg Jan 2009

Larval Settlement Preference Of A Native Bivalve: The Influence Of An Invasive Alga Versus Native Substrata, Paul E. Gribben, Jeffrey T. Wright, Wayne A. O'Connor, Peter Steinberg

Faculty of Science - Papers (Archive)

Recruitment patterns of marine invertebrates are strongly influenced by the habitat preference of larvae as larvae can choose to settle (or not) in response to positive or negative cues. High abundances of recruits of the native infaunal bivalve Anadara trapezia occur in the invasive alga Caulerpa taxifolia compared to native habitats. Using controlled laboratory experiments, A. trapezia larval habitat preference was investigated through exposure to available native (adult A. trapezia, Zostera capricorni and sediment from unvegetated areas) and invasive (C. taxifolia and sediments from C. taxifolia) substrata that co-occur in estuaries invaded by C. taxifolia in New South Wales, Australia. …


Media, Government And Manipulation: The Cases Of The Two Gulf Wars, William Hutchinson Dec 2008

Media, Government And Manipulation: The Cases Of The Two Gulf Wars, William Hutchinson

Australian Information Warfare and Security Conference

This paper explores the bias and manipulation of the Western mass media during the Gulf wars of 1991 and 2003. The tactics of compliance and the ethics of the press and journalists are examined. The need for a pluralist press is extolled.


Further Results On Strongbox Secured Secret Sharing Schemes, G. Gamble, B. M. Maenhaut, Jennifer Seberry, A. Penfold Street May 2008

Further Results On Strongbox Secured Secret Sharing Schemes, G. Gamble, B. M. Maenhaut, Jennifer Seberry, A. Penfold Street

Professor Jennifer Seberry

We extend our earlier work on ways in which defining sets of combinatorial designs can be used to create secret sharing schemes. We give an algorithm for classifying defining sets of designs according to their security properties and summarise the results of this algorithm for many small designs. Finally, we discuss briefly how defining sets can be applied to variations of the basic secret sharing scheme.


Influence Of Inductance Variation On Performance Of A Permanent Magnet Claw Pole Soft Magnetic Composite Motor, Youguang Guo, Jian Zhu, Zhi Lin, Haiyan Lu, Xiaolin Wang, Jiaxin Chen Jan 2008

Influence Of Inductance Variation On Performance Of A Permanent Magnet Claw Pole Soft Magnetic Composite Motor, Youguang Guo, Jian Zhu, Zhi Lin, Haiyan Lu, Xiaolin Wang, Jiaxin Chen

Australian Institute for Innovative Materials - Papers

Winding inductance is an important parameter in determining the performance of electrical machines, particularly those with large inductance variation. This paper investigates the influence of winding inductance variation on the performance of a three-phase three-stack claw pole permanent magnet motor with soft magnetic composite (SMC) stator by using an improved phase variable model. The winding inductances of the machine are computed by using a modified incremental energy method, based on three-dimensional nonlinear time-stepping magnetic field finite element analyses. The inductance computation and performance simulation are verified by the experimental results of an SMC claw pole motor prototype.


The Power And Influence In Some Youden Squares And Secret Sharing, Lakoa Fitina, Kenneth G. Russell, Jennifer Seberry Jan 2007

The Power And Influence In Some Youden Squares And Secret Sharing, Lakoa Fitina, Kenneth G. Russell, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

We investigate subsets of critical sets of some Youden squares in the context of secret sharing schemes. A subset C of a Youden square is called a critical set, if C can be uniquely completed to a Youden square but any subset of C cannot does not have a unique completion to a Youden square. That part of a Youden square Y which is inaccessible to subsets of a critical set C of Y, called the strongbox of C, may be thought to contain secret information. We study the size of the secret. Seberry and Street have shown how strongboxes …


The Influence Of Site Physical Characteristics On Power Quality Performance, Glenn Nicholson, Victor J. Gosbell, Ashok Parsotam Jan 2006

The Influence Of Site Physical Characteristics On Power Quality Performance, Glenn Nicholson, Victor J. Gosbell, Ashok Parsotam

Faculty of Informatics - Papers (Archive)

Routine power quality (PQ) monitoring is limited to a statistical sample of sites that are hopefully representative of the overall PQ performance of the network. It would be helpful if the PQ performance of un-monitored sites could be inferred from the results of a PQ survey from a site having similar physical characteristics. This is only possible if it is known which physical characteristics are most influential in determining PQ performance. This paper describes the application of factor analysis techniques to determine the relationship between known site physical characteristics and PQ disturbance levels on the Vector Distribution Network (Auckland, New …


Influence Of The Iron Sheath On The Local Supercurrent Distribution In Mgb2 Wires, Marie Roussel, Alexey V. Pan, Sihai Zhou, S X. Dou Jan 2006

Influence Of The Iron Sheath On The Local Supercurrent Distribution In Mgb2 Wires, Marie Roussel, Alexey V. Pan, Sihai Zhou, S X. Dou

Australian Institute for Innovative Materials - Papers

The magnetic behavior of iron sheathed magnesium diboride (MgB2) wires was investigated. Global magnetization measurements have shown unusual critical current density variations compare to a superconductor with no magnetic environment. Local quantitative studies, through MO images, are linked to these global magnetization measurements in order to better understand the observed results. It is shown that the current distribution is affected by the soft magnetic sheath interacting with the superconducting core.


The Power And Influence In Some Youden Squares And Secret Sharing, L. Fitina, Ken Russell, Jennifer Seberry Sep 2005

The Power And Influence In Some Youden Squares And Secret Sharing, L. Fitina, Ken Russell, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

We investigate subsets of critical sets of some Youden squares in the context of secret sharing schemes. A subset C of a Youden square is called a critical set, if C can be uniquely completed to a Youden square but any subset of C cannot does not have a unique completion to a Youden square. That part of a Youden square Y which is inaccessible to subsets of a critical set C of Y, called the strongbox of C, may be thought to contain secret information. We study the size of the secret. Seberry and Street have shown how strongboxes …


Further Results On Strongbox Secured Secret Sharing Schemes, G. Gamble, B. M. Maenhaut, Jennifer Seberry, A. Penfold Street Jun 2004

Further Results On Strongbox Secured Secret Sharing Schemes, G. Gamble, B. M. Maenhaut, Jennifer Seberry, A. Penfold Street

Faculty of Informatics - Papers (Archive)

We extend our earlier work on ways in which defining sets of combinatorial designs can be used to create secret sharing schemes. We give an algorithm for classifying defining sets of designs according to their security properties and summarise the results of this algorithm for many small designs. Finally, we discuss briefly how defining sets can be applied to variations of the basic secret sharing scheme.


Thermoregulation By Kangaroos From Mesic And Arid Habitats: Influence Of Temperature On Routes Of Heat Loss In Eastern Grey Kangaroos (Macropus Giganteus) And Red Kangaroos (Macropus Rufus), Terence J. Dawson, Cyntina E. Blaney, Adam J. Munn, Andrew Krockenberger, Shane K. Maloney Jan 2000

Thermoregulation By Kangaroos From Mesic And Arid Habitats: Influence Of Temperature On Routes Of Heat Loss In Eastern Grey Kangaroos (Macropus Giganteus) And Red Kangaroos (Macropus Rufus), Terence J. Dawson, Cyntina E. Blaney, Adam J. Munn, Andrew Krockenberger, Shane K. Maloney

Faculty of Science - Papers (Archive)

We examined thermoregulation in red kangaroos (Macropus rufus) from deserts and in eastern grey kangaroos (Macropus giganteus) from mesic forests/woodlands. Desert kangaroos have complex evaporative heat loss mechanisms, but the relative importance of these mechanisms is unclear. Little is known of the abilities of grey kangaroos. Our detailed study of these kangaroos' thermoregulatory responses at air temperatures (T-a) From -5 degrees to 45 degrees C showed that, while some differences occur, their abilities are fundamentally similar. Both species show the basic marsupial characteristics of relatively low basal metabolism and body temperature (T-b). Within the thermoneutral zone, T-b was 36.3 degrees …


Influence Of Prey Availability On Walleye (Stizostedion Vitreum), Mark T. Porath May 1996

Influence Of Prey Availability On Walleye (Stizostedion Vitreum), Mark T. Porath

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.