title: Security visualization intelligence model for law enforcement investigations

authors: Garae, Jeffery

subjects: computer science

abstract: Data analytic methods and techniques have proven crucial in aiding law enforcement investigations and day-to-day operations. However, the rise of cyber-attacks across transnational jurisdictions creates a challenge to share information across law enforcement agencies. Malware, Bitcoin and social media datasets are some examples. Security visualization is a solution to facilitate information sharing across jurisdictions comfortably in enhancing investigations without revealing the underlying sensitive raw data therefore, reducing the time spent on analysing and processing such large dataset. In this paper we introduce the "Security Visualization Intelligence (SVInt) framework", a visualization intelligence model for investigations and situation awareness deployed for the international law enforcement domain. We provide an effective user-centric visual method of analysing, sharing and exchanging complex datasets using visualization to aid law enforcement investigations. Attribution and evidence preservation without revealing the underlying raw data is the primary goal for SVInt. The SVInt framework provide visualizations of Bitcoin transaction relationships and threat map visualization showing top malware threats using geo-locations. It also provides expendable visualization features for future investigation demands. Finally, we provide possible future work within the law enforcement security visualization domain.

text: Security visualization intelligence model for law enforcement investigations Data analytic methods and techniques have proven crucial in aiding law enforcement investigations and day-to-day operations. However, the rise of cyber-attacks across transnational jurisdictions creates a challenge to share information across law enforcement agencies. Malware, Bitcoin and social media datasets are some examples. Security visualization is a solution to facilitate information sharing across jurisdictions comfortably in enhancing investigations without revealing the underlying sensitive raw data therefore, reducing the time spent on analysing and processing such large dataset. In this paper we introduce the "Security Visualization Intelligence (SVInt) framework", a visualization intelligence model for investigations and situation awareness deployed for the international law enforcement domain. We provide an effective user-centric visual method of analysing, sharing and exchanging complex datasets using visualization to aid law enforcement investigations. Attribution and evidence preservation without revealing the underlying raw data is the primary goal for SVInt. The SVInt framework provide visualizations of Bitcoin transaction relationships and threat map visualization showing top malware threats using geo-locations. It also provides expendable visualization features for future investigation demands. Finally, we provide possible future work within the law enforcement security visualization domain.

year: 2018

title: A comparative study of functional monomer and crosslinker ratios in the synthesis of  catechin-selective MIPs via suspension polymerisation

authors: Pitaduwa Gamage, Sandeepa  Thathsarani Wickramasinghe

subjects: molecularly imprinted polymers

abstract: Catechin contamination in food and environmental samples presents challenges for selective extraction and analysis, requiring advanced polymeric materials with high specificity and capacity. This study investigates the synthesis of catechin-selective molecularly imprinted polymers (MIPs) using suspension polymerisation, with a systematic evaluation of crosslinker-to-monomer (CL:M) and template-to-monomer (T:M) ratios. Polymers were prepared with CL:M ratios ranging from 1:1 to 4:1 and T:M ratios from 0 to 0.5, and characterised by particle size analysis, BET surface area and pore measurements, and scanning electron microscopy (SEM). Adsorption experiments were conducted at initial catechin concentrations of 2.5–10 mg/L, and binding isotherm models were applied to interpret the adsorption mechanisms.
Polymers synthesised at CL:M ratios of 1:1 and 2:1 with T:M = 0.125 exhibited the highest adsorption capacities, consistently achieving values above 0.080 mg/g at 10 mg/L catechin. These optimal conditions also produced polymers with yields up to 94.7%, median particle diameters between 1100–1500 μm, and average pore radii approaching 10 Å. In addition, SEM analysis revealed that optimal samples displayed uniform, spherical morphology with well-developed surface porosity, whereas non-optimal samples showed increased aggregation and denser, less accessible surfaces. Notably, the Temkin isotherm provided the best fit for the adsorption data (R² = 0.9807), indicating heterogeneous binding sites and significant adsorbate–adsorbate interactions. In contrast, higher crosslinker (CL:M= 4:1 and 3:1) or template ratios (T:M= 0.375 and 0.5) led to reduced adsorption capacity and, in some cases, persistent template leaching. These results indicate that extraction conditions must be carefully optimised, such as by increasing Soxhlet extraction time or adjusting solvent parameters, to ensure complete template removal and improve polymer performance in practical applications. Overall, these findings establish suspension polymerisation, combined with carefully optimised synthesis and extraction conditions, as an effective strategy for producing catechin-selective MIPs with enhanced selectivity, capacity, and reproducibility.

text: A comparative study of functional monomer and crosslinker ratios in the synthesis of  catechin-selective MIPs via suspension polymerisation Catechin contamination in food and environmental samples presents challenges for selective extraction and analysis, requiring advanced polymeric materials with high specificity and capacity. This study investigates the synthesis of catechin-selective molecularly imprinted polymers (MIPs) using suspension polymerisation, with a systematic evaluation of crosslinker-to-monomer (CL:M) and template-to-monomer (T:M) ratios. Polymers were prepared with CL:M ratios ranging from 1:1 to 4:1 and T:M ratios from 0 to 0.5, and characterised by particle size analysis, BET surface area and pore measurements, and scanning electron microscopy (SEM). Adsorption experiments were conducted at initial catechin concentrations of 2.5–10 mg/L, and binding isotherm models were applied to interpret the adsorption mechanisms.
Polymers synthesised at CL:M ratios of 1:1 and 2:1 with T:M = 0.125 exhibited the highest adsorption capacities, consistently achieving values above 0.080 mg/g at 10 mg/L catechin. These optimal conditions also produced polymers with yields up to 94.7%, median particle diameters between 1100–1500 μm, and average pore radii approaching 10 Å. In addition, SEM analysis revealed that optimal samples displayed uniform, spherical morphology with well-developed surface porosity, whereas non-optimal samples showed increased aggregation and denser, less accessible surfaces. Notably, the Temkin isotherm provided the best fit for the adsorption data (R² = 0.9807), indicating heterogeneous binding sites and significant adsorbate–adsorbate interactions. In contrast, higher crosslinker (CL:M= 4:1 and 3:1) or template ratios (T:M= 0.375 and 0.5) led to reduced adsorption capacity and, in some cases, persistent template leaching. These results indicate that extraction conditions must be carefully optimised, such as by increasing Soxhlet extraction time or adjusting solvent parameters, to ensure complete template removal and improve polymer performance in practical applications. Overall, these findings establish suspension polymerisation, combined with carefully optimised synthesis and extraction conditions, as an effective strategy for producing catechin-selective MIPs with enhanced selectivity, capacity, and reproducibility.

year: 2025-07-05

title: Hoea te waka reo e 'Āti Rangi ē! He Kohinga Kōrero

authors: Fairhall, Tīahomarama Te Haana

subjects: Māori

abstract: He taonga tuku iho Te Reo Māori nō tāukiuki, nō tuawhakarere, nō onamata rānō, he kākano i ruia mai i Rangiātea. He taonga Te Reo Māori i raro i ngā tikanga o Te Tiriti o Waitangi, ā, nō te tau 1987 ka whakamanahia hai reo tūturu o Aotearoa. Ahakoa he reo tuku iho ki tērā whakatupuranga, ki tērā whakatupuranga, kai te tāmate te reo. He huhua noa ngā rautaki e whakarauora ai i te reo i roto i ngā kura, i ngā whānau, i ngā hapū, i ngā iwi anō hoki. 

Ko te tino o te tuhinga roa nei he āta titiro ki ngā momo rautaki a ngā uri e whakarauora nei i tō tātou reo ki roto o Ngāti Rangiwewehi kia kore ai ā mātou tamariki, ā mātou mokopuna e haere reo kore. Nō roto mai i te tuhinga nei ka āta whakatewhatewha te iwi o Ngāti Rangiwewehi o mua, kia mārama ai ki ōna āhua, ki ōna whenua, ki āna kōrero, ki ōna tāngata, ki ōna pūkōrero, ki tōna ahurei. Ka mutu, ka āta titiro, ka āta tātari, ka āta wetewete i ngā raraunga kōrero i kapo mai i ngā uiuinga, i kapo mai i ngā pātaitai, i kapo mai i ngā pukapuka kōrero ngā momo rautaki e whakarauora ai te reo o ngā uri o Ngāti Rangiwewehi. Hai āpitihanga, ka āta whakatakoto hoki i ngā piki me ngā heke o te reo ā tatauranga nei, ka kitea te ahunga mai i te wā i a koroua mā, i a kuia mā, ā, moroki noa nei.

Kai roto i ngā upoko o te tuhingaroa nei te tino ia o ngā kōrero, ā, e ono ngā upoko e whakatinana ai tēnei rangahau. Kai te upoko tuatahi e tino kōrerohia ana te iwi o Ngāti Rangiwewehi. Kātahi rā ka uru atu ki ngā whakamahukitanga o ngā mātāpono rangahau kai te upoko tuarua. Ka whakaara mai te upoko tuarua i ngā kaponga ariā me ngā rautaki reo hai tuarā mō te tuhingaroa nei. Kai te upoko tuawhā me te tuarima ngā pitopito kōrero, ngā putanga o te pākiki me ngā uiuinga. Ka mutu mai ki te upoko tuaono, ki te kupu whakamutunga o te tuhingaroa.

The Māori language is a taonga protected under the terms of Te Tiriti o Waitangi. An official language of New Zealand, since 1987. However, although a language passed down from generation to generation, the future of the language is not secure. Efforts are endless in providing many strategies of revitalization and ensuring that Te Reo Māori survives within kura, whare wānanga, whānau, hapū and iwi. The purpose of this research is to gather information pertaining to the tribe of Ngāti Rangiwewehi. This study will explore Ngāti Rangiwewehi in a traditional context, their traditional qualities and will also examine the contributions of the descendants in preserving Te Reo Māori. Furthermore, this study will also examine the ups and downs of the language and how Ngāti Rangiwewehi rates statisticaly in the national census under Te Reo Māori. This information will be gathered to examine strategy examples of Te reo that could benefit both present and future generations. As part of my research I will be interviewing key informants and conducting a survey. There are six chapters to this thesis. Chapter one is based on Ngāti Rangiwewehi as a iwi, past and present. Chapter two is based on the research methodology. Chapter three is the literature review, while Chapter four is the questionnaire. Chapter five are the interviews and lastly Chapter 6, the conclusion.

text: Hoea te waka reo e 'Āti Rangi ē! He Kohinga Kōrero He taonga tuku iho Te Reo Māori nō tāukiuki, nō tuawhakarere, nō onamata rānō, he kākano i ruia mai i Rangiātea. He taonga Te Reo Māori i raro i ngā tikanga o Te Tiriti o Waitangi, ā, nō te tau 1987 ka whakamanahia hai reo tūturu o Aotearoa. Ahakoa he reo tuku iho ki tērā whakatupuranga, ki tērā whakatupuranga, kai te tāmate te reo. He huhua noa ngā rautaki e whakarauora ai i te reo i roto i ngā kura, i ngā whānau, i ngā hapū, i ngā iwi anō hoki. 

Ko te tino o te tuhinga roa nei he āta titiro ki ngā momo rautaki a ngā uri e whakarauora nei i tō tātou reo ki roto o Ngāti Rangiwewehi kia kore ai ā mātou tamariki, ā mātou mokopuna e haere reo kore. Nō roto mai i te tuhinga nei ka āta whakatewhatewha te iwi o Ngāti Rangiwewehi o mua, kia mārama ai ki ōna āhua, ki ōna whenua, ki āna kōrero, ki ōna tāngata, ki ōna pūkōrero, ki tōna ahurei. Ka mutu, ka āta titiro, ka āta tātari, ka āta wetewete i ngā raraunga kōrero i kapo mai i ngā uiuinga, i kapo mai i ngā pātaitai, i kapo mai i ngā pukapuka kōrero ngā momo rautaki e whakarauora ai te reo o ngā uri o Ngāti Rangiwewehi. Hai āpitihanga, ka āta whakatakoto hoki i ngā piki me ngā heke o te reo ā tatauranga nei, ka kitea te ahunga mai i te wā i a koroua mā, i a kuia mā, ā, moroki noa nei.

Kai roto i ngā upoko o te tuhingaroa nei te tino ia o ngā kōrero, ā, e ono ngā upoko e whakatinana ai tēnei rangahau. Kai te upoko tuatahi e tino kōrerohia ana te iwi o Ngāti Rangiwewehi. Kātahi rā ka uru atu ki ngā whakamahukitanga o ngā mātāpono rangahau kai te upoko tuarua. Ka whakaara mai te upoko tuarua i ngā kaponga ariā me ngā rautaki reo hai tuarā mō te tuhingaroa nei. Kai te upoko tuawhā me te tuarima ngā pitopito kōrero, ngā putanga o te pākiki me ngā uiuinga. Ka mutu mai ki te upoko tuaono, ki te kupu whakamutunga o te tuhingaroa.

The Māori language is a taonga protected under the terms of Te Tiriti o Waitangi. An official language of New Zealand, since 1987. However, although a language passed down from generation to generation, the future of the language is not secure. Efforts are endless in providing many strategies of revitalization and ensuring that Te Reo Māori survives within kura, whare wānanga, whānau, hapū and iwi. The purpose of this research is to gather information pertaining to the tribe of Ngāti Rangiwewehi. This study will explore Ngāti Rangiwewehi in a traditional context, their traditional qualities and will also examine the contributions of the descendants in preserving Te Reo Māori. Furthermore, this study will also examine the ups and downs of the language and how Ngāti Rangiwewehi rates statisticaly in the national census under Te Reo Māori. This information will be gathered to examine strategy examples of Te reo that could benefit both present and future generations. As part of my research I will be interviewing key informants and conducting a survey. There are six chapters to this thesis. Chapter one is based on Ngāti Rangiwewehi as a iwi, past and present. Chapter two is based on the research methodology. Chapter three is the literature review, while Chapter four is the questionnaire. Chapter five are the interviews and lastly Chapter 6, the conclusion.

year: 2015