Showing items 1 - 20 of 15500

On stability of M-stationary points in MPCCs

  • Authors: Červinka, Michal , Outrata, Jiri , Pištěk, M
  • Date: 2014
  • Type: Text , Journal article
  • Relation: Set-Valued and Variational Analysis Vol. 22, no. 3 (2014), p. 575-595
  • Relation: http://purl.org/au-research/grants/arc/DP110102011
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  • Description: We consider parameterized Mathematical Programs with Complementarity Constraints arising, e.g., in modeling of deregulated electricity markets. Using the standard rules of the generalized differential calculus we analyze qualitative stability of solutions to the respective M-stationarity conditions. In particular, we provide characterizations and criteria for the isolated calmness and the Aubin properties of the stationarity map. To this end, we introduce the second-order limiting coderivative of mappings and provide formulas for this notion and for the graphical derivative of the limiting coderivative in the case of the normal cone mapping to ℝn Funding ARC- Australian Research Council

The effect of stabilization on the utilization of municipal sewage sludge as a soil amendment

  • Authors: Černe, Marko , Palčić, Igor , Pasković, Igor , Major, Nikola , Romić, Marija , Filipović, Vilim , Igrc, Marina Diana , Perčin, Aleksandra , Goreta Ban, Smiljana , Zorko, Benjamin , Vodenik, Branko , Glavič Cindro, Denis , Milačič, Radmila , Heath, David John , Ban, Dean
  • Date: 2019
  • Type: Text , Journal article
  • Relation: Waste Management Vol. 94, no. (2019), p. 27-38
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  • Description: Stabilization procedures affect nutrient and inorganic contaminant concentrations.•Anaerobic sludge has the highest levels of metals and radionuclides.•High P and N contents in sludge are a measure of its potential as a fertilizer.•Adsorption of metals and radionuclides to sludge biomass increases with nutrient content.•Soil amendment with sewage sludge is a promising strategy for nutrient recovery. This study assesses the potential use of different types of stabilized sewage sludge as a soil amendment by considering their physicochemical characteristics, nutritional status, and their trace metal and radionuclide content. The concentrations of trace metals and radionuclides were determined using ICP-OES and gamma-ray spectrometry, respectively. For determining nutritional status and chemical characterization, this study followed standard ISO-recommended procedures. Data analysis revealed that anaerobic sludge contains higher concentrations of Cr, Hg, and Ni compared to aerobic and non-biologically stabilized sludge. A similar observation was observed in the case of 226Ra, 210Pb, 228Ra, and 228Th. Furthermore, the high levels of P and N in aerobic sludge suggest that biologically stabilized sludge has the potential to be a good fertilizer. In addition, the study finds strong evidence that nutrients are involved in the adsorption of metals and radionuclides onto sludge biomass. Overall, eight of the nine studied sludge samples are safe for agricultural use since the concentrations of trace metals fall well below the limits set by Croatian legislation (NN 38/08). In addition, the levels of radionuclides do not pose a radiological risk. This means that soil conditioning with sewage sludge remains a viable strategy for nutrient recovery from municipal waste, although long-term impact assessments of repeated applications are necessary.

The new robust conic GPLM method with an application to finance : prediction of credit default

  • Authors: Özmen, Ay , Weber, Gerhard-Wilhelm , Çavu , Defterli, Özlem
  • Date: 2012
  • Type: Text , Journal article
  • Relation: Journal of Global Optimization Vol.56, no. 2 (2012), p. 233–249
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  • Description: This paper contributes to classification and identification in modern finance through advanced optimization. In the last few decades, financial misalignments and, thereby, financial crises have been increasing in numbers due to the rearrangement of the financial world. In this study, as one of the most remarkable of these, countries' debt crises, which result from illiquidity, are tried to predict with some macroeconomic variables. The methodology consists of a combination of two predictive regression models, logistic regression and robust conic multivariate adaptive regression splines (RCMARS), as linear and nonlinear parts of a generalized partial linear model. RCMARS has an advantage of coping with the noise in both input and output data and of obtaining more consistent optimization results than CMARS. An advanced version of conic generalized partial linear model which includes robustification of the data set is introduced: robust conic generalized partial linear model (RCGPLM). This new model is applied on a data set that belongs to 45 emerging markets with 1,019 observations between the years 1980 and 2005. © 2012 Springer Science+Business Media, LLC.

Deltamides and croconamides: Expanding the range of dual h‐bond donors for selective anion recognition

  • Authors: Zwicker, Vincent , Yuen, Karen , Smith, David , Ho, Junming , Qin, Lei , Turner, Peter , Jolliffe, Katrina
  • Date: 2018
  • Type: Text , Journal article
  • Relation: Chemistry : a European journal Vol. 24, no. 5 (2018), p. 1140-1150
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  • Description: Dual H‐bond donors are widely used as recognition motifs in anion receptors. We report the synthesis of a library of dual H‐bond receptors, incorporating the deltic and croconic acid derivatives, termed deltamides and croconamides, respectively, and a comparison of their anion binding affinities (for monovalent species) and Brønsted acidities to those of the well‐established urea and squaramide dual H‐bond donor motifs. For dual H‐bonding cores with identical substituents, the trend in Brønsted acidity is croconamides>squaramides>deltamides>ureas, with the croconamides found to be 10–15 pKa units more acidic than the corresponding ureas. In contrast to the trends displayed by ureas, deltamides and squaramides, N,N′‐dialkyl croconamides displayed higher binding affinity to chloride than the N,N′‐diaryl derivatives, which was attributed to partial deprotonation of the N,N′‐diaryl derivatives at neutral pH. A number of differences in anion binding selectivity were observed upon comparison of the dual H‐bond cores. Whereas the squaramides display similar affinity for both chloride and acetate ions, the ureas have significantly higher affinity for acetate than chloride ions and the deltamides display higher affinity for dihydrogenphosphate ions than other oxoanions or halides. These inherent differences in binding affinity could be exploited in the design of anion receptors with improved ability to discriminate between monovalent anions. Croconamides spotted in the delta! Bite‐angle and Brønsted acidity control anion binding affinity and selectivity by amides from the oxo‐carbon family.

Carfilzomib promotes the unfolded protein response and apoptosis in cetuximab-resistant colorectal cancer

  • Authors: Zulkifli, Ahmad , Tan, Fiona , Areeb, Zammam , Stuart, Sarah , Luwor, Rodney
  • Date: 2021
  • Type: Text , Journal article
  • Relation: International Journal of Molecular Sciences Vol. 22, no. 13 (2021), p.
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  • Description: Cetuximab is a common treatment option for patients with wild-type K-Ras colorectal carcinoma. However, patients often display intrinsic resistance or acquire resistance to cetuximab following treatment. Here we generate two human CRC cells with acquired resistance to cetuximab that are derived from cetuximab-sensitive parental cell lines. These cetuximab-resistant cells display greater in vitro proliferation, colony formation and migration, and in vivo tumour growth compared with their parental counterparts. To evaluate potential alternative therapeutics to cetuximab-acquired-resistant cells, we tested the efficacy of 38 current FDA-approved agents against our cetuximab-acquired-resistant clones. We identified carfilzomib, a selective proteosome inhibitor to be most effective against our cell lines. Carfilzomib displayed potent antiproliferative effects, induced the unfolded protein response as determined by enhanced CHOP expression and ATF6 activity, and enhanced apoptosis as determined by enhanced caspase-3/7 activity. Overall, our results indicate a potentially novel indication for carfilzomib: that of a potential alternative agent to treat cetuximab-resistant colorectal cancer. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. **Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Rodney Luwor” is provided in this record**

To be fair or efficient or a bit of both

  • Authors: Zukerman, Moshe , Mammadov, Musa , Tan, Liansheng , Ouveysi, Iradj , Andrew, Lachlan
  • Date: 2008
  • Type: Text , Journal article
  • Relation: Computers and Operations Research Vol. 35, no. 12 (2008), p. 3787-3806
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  • Description: IIntroducing a new concept of (®, ¯)-fairness, which allows for a bounded fairness compromise, so that a source is allocated a rate neither less than 0 · ® · 1, nor more than ¯ ¸ 1, times its fair share, this paper provides a framework to optimize efficiency (utilization, throughput or revenue) subject to fairness constraints in a general telecommunications network for an arbitrary fairness criterion and cost functions. We formulate a non-linear program (NLP) that finds the optimal bandwidth allocation by maximizing efficiency subject to (®, ¯)-fairness constraints. This leads to what we call an efficiency-fairness function, which shows the benefit in efficiency as a function of the extent to which fairness is compromised. To solve the NLP we use two algorithms. The first is a well known branch-and-bound-based algorithm called Lipschitz Global Optimization and the second is a recently developed algorithm called Algorithm for Global Optimization Problems (AGOP). We demonstrate the applicability of the framework to a range of example from sharing a single link to efficiency fairness issues associated with serving customers in remote communities.
  • Description: C1

Space : Contemplating the voids

  • Authors: Zuccolo, Michelle
  • Date: 2006
  • Type: Text , Thesis , Masters
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  • Description: This research project into the manipulation of spatial concepts by artists on the two-dimensional surface plane, has involved a selected study into cultural and aesthetic evolution from early civilization through to the present era. I have cast a line of inquiry into eastern, western and primitive art practices, observing the journey of chance accelerated by developments in technology. Traditionally artists utilized modes of spatial convention and techniques according to the specific cultural traditions of the time and place of their production. By contrast, contemporary artists know no such boundaries, and are able to select from a range of spatial options relevant both to current forms of expression and to a personal visual language. My own art practice has been enriched and extended, increasing my ability to challenge the notion of still life composition by reversing the traditional hierarchy of form and space through the application of a series of experiments brought about by extensive research into this spatial evolution. The research project has further assisted this development in my art practice by engaging me in a new level of understanding of the topic, informing my perceptions and increasing my ability to translate a combination of forms in space with heightened emotion and personal meaning.
  • Description: Master of Arts (Visual Arts)

The expendable teacher in covid-19 times : a poetic inquiry into the reconfiguration of governmentality in victorian schools

  • Authors: Zonca, Benjamin , Ambrosy, Josh
  • Date: 2021
  • Type: Text , Journal article
  • Relation: Journal for Critical Education Policy Studies Vol. 19, no. 1 (2021), p. 212-248
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  • Description: The actualization of a neoliberal rationality has been widely explored in global education policy and Australian schools. This paper draws on engagements with neoliberalism as rationality made ‘real’ through government practices, specifically those that reify the teaching profession into one of risk-management and problem-solving at the expense of deliberation about purposes. In this paper, redacted policy poetry and participant-voiced poetry are employed in parallel to explore the COVID-19 crisis as it emerged in the State of Victoria, Australia with a specific focus on the reconfiguration of risk-management discourses through blanket policy directive. This paper identifies and explores three themes highlighted by this reconfiguration of risk discourse and shifts in modes of governance during this time that are magnified by a teacher’s affective and practical responses to the situation. They are: (1) collective teacher response to overt policy decisions that compel the teacher to embrace risk; (2) contradictions of expectation for schools to continue as usual; and (3) an explicit shift away from instrumental evidence-based pedagogies toward new purposes, pedagogies, and community engagement with little guidance. © 2021, Institute for Education Policy Studies. All rights reserved.

An application of near infra-red fibre bragg grating as dynamic sensor in SHM of thin composite laminates

  • Authors: Zohari, Mohd , Kahandawa, Gayan , Epaarachchi, Jayantha , Lau, Alan , Cook, Kevin , Canning, John
  • Date: 2013
  • Type: Text , Conference paper
  • Relation: Structural health monitoring 2013 : a roadmap to intelligent structures : proceedings of the 9th International Workshop on Structural Health Monitoring p. 267-275
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  • Description: Vibration testing is an essential component in Structural Health Monitoring (SHM). It can provide vital information regarding the integrity of critical structure; for instance, it can provide information on progressive failure monitoring of composites structure in the aerospace industry. Over the past decade, there have been many successful researches showing extraordinary ability of Fiber Bragg grating (FBG) sensors as a dynamic sensor. Ability of acquiring both static and dynamic strain measurements, make FBG sensor as a good alternative to replace the conventional vibration sensors. In addition the physical size of FBG sensor provides greater access to embed them in composite structures without affecting to any properties of the composite. However, in most applications to date, people have used only the FBG with wavelength 1550 nm. Moreover, FBG sensors with this wavelength are commonly use in industries such as telecommunications and medical industries. However, there is an option of using near infra-red (NIR) FBG range which comparably cheap in term of total system design. This paper details the use of near infra-red (NIR) FBGs as dynamic sensors; a part of SHM system for the monitoring of the damages in a thin glass fiber composite plates. Results reveal that the NIR FBG range gives good response to an impact and; also to applied high frequency vibrations.

NIR fibre bragg grating as dynamic sensor : An application of 1D digital wavelet analysis for signal denoising

  • Authors: Zohari, Mohd , Kahandawa, Gayan , Epaarachchi, Jayantha , Lau, Alan , Canning, John , Cook, Kevin
  • Date: 2013
  • Type: Text , Conference paper
  • Relation: Fourth International Conference on Smart Materials and Nanotechnology in Engineering
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  • Description: During the past decade, many successful studies have evidently shown remarkable capability of Fiber Bragg Gratings (FBG) sensor for dynamic sensing. Most of the research works utilized the 1550 nm wavelength range of FBG sensors. However near infra-red (NIR) FBG sensors can offer the lower cost of Structural health Monitoring (SHM) systems which uses cheaper silicon sources and detectors. Unfortunately, the excessive noise levels that experienced in NIR wavelengths have caused the rejection of sensor that operating in this range of wavelengths for SHM systems. However, with the appropriate use of signal processing tools, these noisy signals can be easily ‘cleaned’. Wavelet analysis is one of the powerful signal processing tools nowadays, not only for time-frequency analysis but also for signal denoising. This present study revealed that the NIR FBG range gave good response to impact signals. Furthermore, these ‘noisy’ signals’ response were successfully filtered using one dimensional wavelet analysis.

Teacher perceptions of changes in school infrastructure and how these impact on their teaching practice

  • Authors: Zivave, Takavada
  • Date: 2021
  • Type: Text , Thesis , PhD
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  • Description: The impetus of this study comes from the 2009 Commonwealth Government of Australia’s $16.2 billion investment in school infrastructure under the Building the Education Revolution (BER) program. The BER program was supposed to stimulate the economy through creating construction jobs by building schools and ensuring that workers had jobs during the global financial crisis. Provision of learning spaces and learning space design was secondary to this need to create construction jobs. This thesis aimed to explore the teaching activity using an activity system based on Cultural-Historical Activity Theory (CHAT) (Engestrom, 1987) with the intent of bringing out or exposing the contribution made by the BER school infrastructure program on teaching especially around issues of pedagogy, teamwork, wellbeing, collaboration and interactions with students. Using a mixed-methods approach, the study utilised three sources of data, document analysis, online survey responses and focus group interviews. In the first phase, data were collected using a document analysis, this information guided the design of the online survey instrument, which was used to collect data in the second phase. Data collected using both the document analysis and online survey responses were used in the third phase, which involved focus group interviews. The data analysis involved identifying, grouping together and labelling document analysis, data from the online survey and transcripts of focus group interviews. These were coded and organised into themes, or units of meaning. The quantitative data was presented in frequency tables and descriptive statistics. This quantitative data was corroborated with extracts from focus group interviews and document analysis data where possible. The study’s findings demonstrated that school infrastructure supports teacher collaboration by allowing for team planning and co-teaching. Furthermore, the study revealed a link between teacher collaboration and teacher wellbeing. The study findings indicate that when teachers plan together and co-teach, their workload is reduced contributing positively to teacher wellbeing. The study suggests that a relationship exists between school infrastructure and student-teacher interactions, which serves to reduce negative interactions when dealing with outside classroom behaviour. The present study seeks to generate insights that, while unique to participants and individuals, are anticipated to be of interest to teachers more broadly. Potentially, the findings from this study could inform other educational contexts, for example, school architectural designers. Significantly, this research seeks to contribute to literature on the importance of school infrastructure on teacher performance ultimately improving student-learning outcomes.
  • Description: Doctor of Philosophy

What does it mean when they don't seem to learn from experience?

  • Authors: Zink, Robyn , Dyson, Michael
  • Date: 2009
  • Type: Text , Journal article
  • Relation: Cambridge Journal of Education Vol. 39, no. 2 (2009), p. 163-174
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  • Description: In this paper we use an example of when students appear not to have learnt from their experience to examine some of the 'orthodoxies' of experiential education. This frames a discussion exploring how it is possible for a teacher to declare that students have got it 'wrong' in relation to learning from experience. It is argued that both learning through experience and who has experiences is viewed through specific forms of reason within contemporary experiential education. The paper concludes with a challenge to open reason up to greater scrutiny in experiential education and consider the possibilities that emerge through the indeterminacy of relationships inherent in experience and education. [ABSTRACT FROM AUTHOR]

Factors influencing hand hygiene practice of nursing students : a descriptive, mixed-methods study

  • Authors: Zimmerman, Peta-Anne , Sladdin, Ishtar , Shaban, Ramon , Gilbert, Julia , Brown, Lynne
  • Date: 2020
  • Type: Text , Journal article
  • Relation: Nurse Education in Practice Vol. 44, no. (2020), p.
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  • Description: Developing nursing students' knowledge and practice of infection prevention and control (IPC) is fundamental to safe healthcare. A two-phase descriptive, mixed-method study conducted within a Bachelor of Nursing program at an Australian university aimed to explore: (i) theoretical knowledge of IPC, highlighting hand hygiene, of nursing students and; (ii) nursing students' and clinical facilitators' perceptions of factors influencing these practices during clinical placement. Phase One utilised an anonymous validated questionnaire assessing students' knowledge; identifying variables influencing students' IPC practices, subjected to descriptive and inferential analysis. Phase Two were semi-structured interviews exploring clinical facilitators' experiences/perceptions of students during clinical placement, analysed thematically. Students' demonstrated satisfactory knowledge of IPC in their second and third year, but clinical facilitators perceived that. students lacked awareness of the importance of these practices. Five themes arose from the interviews: (i) understanding workplace culture; (ii) students' modelling local behaviour; (iii) enhancing and consolidating knowledge for practice; (iv) adjusting to practice reality and; (v) accessing additional hand hygiene resources. Factors specific to workplace setting and culture were perceived to influence nursing students' socialisation. Future practice/education strategies could address these factors by ensuring students receive adequate supervision during clinical placement, and having strong advocates/role models present in the workplace. © 2020 Elsevier Ltd

Rainfall and grazing : Not the only barriers to arid-zone conifer recruitment

  • Authors: Zimmer, Heidi , Florentine, Singarayer , Enke, Rita , Westbrooke, Martin
  • Date: 2017
  • Type: Text , Journal article
  • Relation: Australian Journal of Botany Vol. 65, no. 2 (2017), p. 109-119
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  • Description: An understanding of the drivers of infrequent recruitment is fundamental in managing for species persistence. Callitris glaucophylla Joy Thomps. & L.A.S. Johnson (white cypress-pine) is a slow-growing, long-lived conifer, with a distribution that extends across arid Australia. Arid populations of C. glaucophylla are endangered in New South Wales, and are characterised by infrequent recruitment. We examined recruitment patterns of C. glaucophylla in differential grazing exclosures (excluding rabbits, excluding large herbivores or excluding both) and in unfenced areas. More recruitment occurred in rabbit-proof exclosures, compared with nearby large herbivore and control exclosures, although some rabbit-proof exclosures recorded no recruitment. Increases in recruitment at several long-term exclosures were associated with wet periods, as was recruitment at some unfenced sites. Apart from grazing and rainfall, recruitment was related to mature tree size and stand density (probably because of their influence on seed availability). These endangered arid C. glaucophylla woodlands are all that remains of a once extensive distribution, and are habitat for a suite of threatened species. Reduction in grazing pressure, particularly from rabbits, is clearly critical to maintain recruitment in these remnant populations. Chances of recruitment appear to be enhanced in low-density stands, around large trees, and in dune blow outs - fencing should focus on these areas. © 2017 CSIRO.

A study of hydrodynamic pressure in the A-pillar regions of idealised and production cars

A study of the A-pillar vortex of a passenger car

Accounting for cryptic population substructure enhances detection of inbreeding depression with genomic inbreeding coefficients: an example from a critically endangered marsupial

  • Authors: Zilko, Joseph , Harley, Dan , Hansen, Birgita , Pavlova, Alexandra , Sunnucks, Paul
  • Date: 2020
  • Type: Text , Journal article
  • Relation: Molecular Ecology Vol. 29, no. 16 (2020), p. 2978-2993
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  • Description: Characterizing inbreeding depression in wildlife populations can be critical to their conservation. Coefficients of individual inbreeding can be estimated from genome-wide marker data. The degree to which sensitivity of inbreeding coefficients to population genetic substructure alters estimates of inbreeding depression in wild populations is not well understood. Using generalized linear models, we tested the power of two frequently used inbreeding coefficients that are calculated from genome-wide SNP markers, FH and F^III, to predict four fitness traits estimated over two decades in an isolated population of the critically endangered Leadbeater's possum. FH estimates inbreeding as excess observed homozygotes relative to equilibrium expectations, whereas F^III quantifies allelic similarity between the gametes that formed an individual, and upweights rare homozygotes. We estimated FH and F^III from 1,575 genome-wide SNP loci in individuals with fitness trait data (N = 179–237 per trait), and computed revised coefficients, FHby group and F^IIIby group, adjusted for population genetic substructure by calculating them separately within two different genetic groups of individuals identified in the population. Using FH or F^III in the models, inbreeding depression was detected for survival to sexual maturity, longevity and whether individuals bred during their lifetime. F^IIIby group (but not FHby group) additionally revealed significant inbreeding depression for lifetime reproductive output (total offspring assigned to each individual). Estimates of numbers of lethal equivalents indicated substantial inbreeding load, but differing between inbreeding estimators. Inbreeding depression, declining population size, and low and declining genetic diversity suggest that genetic rescue may assist in preventing extinction of this unique Leadbeater's possum population. © 2020 John Wiley & Sons Ltd

Acute cardiovascular responses during post-exercise recovery to short-term exhaustive exercise

  • Authors: Zichy-Woinarski, Christopher
  • Date: 2000
  • Type: Text , Thesis , Masters
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  • Description: "The aim of this study was to examine the effect of consecutive bouts of acute exhaustive exercise in a hot ambient environmemt on baroreflex gain, plasma volume and heart variability one week post-exercise in trained individuals." Problem with pages xviii-xx Pages 9-37 missing.
  • Description: Masters of Applied Science

Teacher pedagogies of dialogic imagination - A narrative inquiry

  • Authors: Zibell, Linda
  • Date: 2016
  • Type: Text , Thesis , PhD
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  • Description: This thesis is a narrative inquiry to investigate teachers’ meanings for imagination and its potency for teaching and learning. Six teachers who identified it as central to their practice shared stories of how imagination is an effective pedagogy through in-depth, semi-structured interviews. Imagination is a living, mercurial phenomenon contested in philosophical circles yet taken-for-granted amongst the populace. Consequently, imagination in teaching and learning is under researched and widely regarded as mere decoration - helpful for engagement but unrelated to cognition. The literature review situates the research in international discussions concerning imagination’s value for teaching and learning. Several conceptualisations of meaning for imagination lead to a theoretical framework which re-conceptualises Bakhtin’s dialogic imagination and combines his philosophy of discourse with Ricoeur’s philosophy of imagination, and Brockmeier’s narrative imagination. Data analysis to compare and contrast the teachers’ meanings to the framework strongly suggests that, contrary to existing stereotypes, imagination is cognitive: it catalyses metaphoric meaning-making events as dialogic imagination. Since an open living discourse and narrative imagination are conditions for such meaning events, the teachers’ pedagogical choices are consequently rational and supportive of learning. Australian educational policy-makers have increasingly leveraged a closed classroom discourse over past decades: teachers must ensure students comply with national testing regimes that demand monologic responses tied to finalised syllabus requirements. Over that period students’ accomplishment has either seriously declined or flatlined. The teachers in this narrative inquiry keep living discourse and imagination open and alive but in spite of, not because of existing policy: the research presented here permits their understandings and professional art to be given voice in educational debates on effective teaching. I conclude policy makers might seriously consider the impacts of policy dynamics and whether they are slowly suffocating opportunities for a living atmosphere that invites imagination – a powerhouse of learning – into their lives.
  • Description: Doctor of Philosophy

Adaptive clustering with feature ranking for DDoS attacks detection

  • Authors: Zi, Lifang , Yearwood, John , Wu, Xin
  • Date: 2010
  • Type: Text , Conference proceedings
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  • Description: Distributed Denial of Service (DDoS) attacks pose an increasing threat to the current internet. The detection of such attacks plays an important role in maintaining the security of networks. In this paper, we propose a novel adaptive clustering method combined with feature ranking for DDoS attacks detection. First, based on the analysis of network traffic, preliminary variables are selected. Second, the Modified Global K-means algorithm (MGKM) is used as the basic incremental clustering algorithm to identify the cluster structure of the target data. Third, the linear correlation coefficient is used for feature ranking. Lastly, the feature ranking result is used to inform and recalculate the clusters. This adaptive process can make worthwhile adjustments to the working feature vector according to different patterns of DDoS attacks, and can improve the quality of the clusters and the effectiveness of the clustering algorithm. The experimental results demonstrate that our method is effective and adaptive in detecting the separate phases of DDoS attacks. © 2010 IEEE.