title: Rating the Significance of Detected Network Events

authors: Mungro, Meenakshee

subjects: Data fusion

abstract: Existing anomaly detection systems do not reliably produce accurate severity ratings for detected network events, which results in network operators wasting a large amount of time and effort in investigating false alarms. This project investigates the use of data fusion to combine evidence from multiple anomaly detection methods to produce a consistent and accurate representation of the severity of a network event. Four new detection methods were added to Netevmon, a network anomaly detection framework, and ground truth was collected from a latency training dataset to calculate the set of probabilities required for each of the five data fusion methods chosen for testing. The evaluation was performed against a second test dataset containing manually assigned severity scores for each event and the significance ratings produced by the fusion methods were compared against the assigned severity score to determine the accuracy of each data fusion method.

The results of the evaluation showed that none of the data fusion methods achieved a desirable level of accuracy for practical deployment. However, Dempster-Shafer was the most promising of the fusion methods investigated due to correctly classifying more significant events than the other methods, albeit with a slightly higher false alarm rate. We conclude by suggesting some possible options for improving the accuracy of Dempster-Shafer that could be investigated as part of future work.

text: Rating the Significance of Detected Network Events Existing anomaly detection systems do not reliably produce accurate severity ratings for detected network events, which results in network operators wasting a large amount of time and effort in investigating false alarms. This project investigates the use of data fusion to combine evidence from multiple anomaly detection methods to produce a consistent and accurate representation of the severity of a network event. Four new detection methods were added to Netevmon, a network anomaly detection framework, and ground truth was collected from a latency training dataset to calculate the set of probabilities required for each of the five data fusion methods chosen for testing. The evaluation was performed against a second test dataset containing manually assigned severity scores for each event and the significance ratings produced by the fusion methods were compared against the assigned severity score to determine the accuracy of each data fusion method.

The results of the evaluation showed that none of the data fusion methods achieved a desirable level of accuracy for practical deployment. However, Dempster-Shafer was the most promising of the fusion methods investigated due to correctly classifying more significant events than the other methods, albeit with a slightly higher false alarm rate. We conclude by suggesting some possible options for improving the accuracy of Dempster-Shafer that could be investigated as part of future work.

year: 2014

title: Green and economic fabrication of Zinc Oxide (ZnO) Nanorods as a broadband UV blocker and antimicrobial agent

authors: Taghizadeh, Seyedeh-Masoumeh

subjects: Science & Technology

abstract: Zinc oxide (ZnO) nanoparticles have gained widespread interest due to their unique properties, making them suitable for a range of applications. Several methods for their production are available, and of these, controlled synthesis techniques are particularly favourable. Large-scale culturing of Chlorella vulgaris produces secretory carbohydrates as a waste product, which have been shown to play an important role in directing the particle size and morphology of nanoparticles. In this investigation, ZnO nanorods were produced through a controlled synthesis approach using secretory carbohydrates from C. vulgaris, which presents a cost-effective and sustainable alternative to the existing techniques. Fourier transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD) analysis, transmission electron microscopy (TEM), and UV-Vis spectroscopy were used to characterise the nanorods. The prepared nanorods exhibited a broad range of UV absorption, which suggests that the particles are a promising broadband sun blocker and are likely to be effective for the fabrication of sunscreens with protection against both UVB (290–320 nm) and UVA (320–400 nm) radiations. The antimicrobial activity of the prepared nanorods against Gram-positive and Gram-negative bacteria was also assessed. The nanostructures had a crystalline structure and rod-like appearance, with an average length and width of 150 nm and 21 nm, respectively. The nanorods also demonstrated notable antibacterial activity, and 250 μg/mL was determined to be the most effective concentration. The antibacterial properties of the ZnO nanorods suggest its suitability for a range of antimicrobial uses, such as in the food industry and for various biomedical applications

text: Green and economic fabrication of Zinc Oxide (ZnO) Nanorods as a broadband UV blocker and antimicrobial agent Zinc oxide (ZnO) nanoparticles have gained widespread interest due to their unique properties, making them suitable for a range of applications. Several methods for their production are available, and of these, controlled synthesis techniques are particularly favourable. Large-scale culturing of Chlorella vulgaris produces secretory carbohydrates as a waste product, which have been shown to play an important role in directing the particle size and morphology of nanoparticles. In this investigation, ZnO nanorods were produced through a controlled synthesis approach using secretory carbohydrates from C. vulgaris, which presents a cost-effective and sustainable alternative to the existing techniques. Fourier transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD) analysis, transmission electron microscopy (TEM), and UV-Vis spectroscopy were used to characterise the nanorods. The prepared nanorods exhibited a broad range of UV absorption, which suggests that the particles are a promising broadband sun blocker and are likely to be effective for the fabrication of sunscreens with protection against both UVB (290–320 nm) and UVA (320–400 nm) radiations. The antimicrobial activity of the prepared nanorods against Gram-positive and Gram-negative bacteria was also assessed. The nanostructures had a crystalline structure and rod-like appearance, with an average length and width of 150 nm and 21 nm, respectively. The nanorods also demonstrated notable antibacterial activity, and 250 μg/mL was determined to be the most effective concentration. The antibacterial properties of the ZnO nanorods suggest its suitability for a range of antimicrobial uses, such as in the food industry and for various biomedical applications

year: 2020

title: Te kura o Ruatoki 1896 - 1979

authors: Williams, Kim Reina Reremoana

subjects: Ruatoki Native School

abstract: Ko tēnei tuhinga roa e kōrero ana mō te Kura o Ruatoki i roto i te rohe o te iwi o Tūhoe. I whakatūria he kura i te tau 1896 i runga i te inoi a ngā Koroua ki te Kāwanatanga o taua wā.
Hai te Upoko tuatahi, ka whakatakotoria ngā kōrero mō te āhua o te whenua, ngā tāngata me ā rātau nekeneke. Tutū ana te puehu i runga i ngā whakatū waewae ki te iwi, ki te Pākehā hoki mō taua whenua.
Hai te Upoko tuarua ka takoto ngā kōrero mō te heke o ngā pānui o ngā inoi, ngā reta a ngā Koroua ki te Kāwanatanga mō te whakatū i tētahi Kura i Ruatoki. Te nuinga o ēnei rauemi i rangahaua, i kitea, i te Whare pukapuka o Pōneke. Ko ētahi i te Whare pukapuka o Tāmaki. Ka tau te tono, ka kitea te tūtukitanga o te ao Pākehā ki te ao Māori, otirā, kua puta te kaupapa i whakatūria ake ai te kura hei whakatangata whenua i ngā tāngata, i ngā aronga hinengaro Māori kia rite ki tō te Pākehā.
Hai te Upoko tuatoru ka tirohia ko ngā tuhinga a ngā Tumuaki mai i te tau 1896 ki te tau 1979 mō te Kura o Ruatoki. Ka kite i roto i ā rātau tirohanga te āhua o tā rātau kaihautū i te rerenga o te kaupapa nei. Ko ngā kaihautū i te waka nei, he tūmau noa nā te Kāwanatanga hai whakatō i te Pākehātanga ki roto i te whatumanawa Māori.
He tini o te whārua i hinga i roto i ēnei tau i runga i ngā mate urutī, mate tauhou i pā ki roto i te whārua. Ahakoa tērā ka tukuna tonu ngā tamariki ki te kura i runga i te whakapono he oranga ka puta mai i reira. I te tau 1946 ka tū he kura tuarua, he Māori District High School. Ko te nuinga o ngā tamariki o Tawera rāua ko Ruatoki i haere mai ki tēnei kura. Tokoiti ia tau i whiwhi karahipi mō te haere ki ngā kura hāhi o Tīpene rāua ko Wikitōria. Tērā pea he tango atu i ēnei tamariki mai i ngā āhuatanga Māori o te whārua.
Hai te upoko tuawhā, ka whakakorehia te kura tuarua. Ko ngā take mō te katinga ka āta whakamāramahia. He mahi nanakia nā te tari Mātauranga me āna āpiha i runga i ngā nekeneke mō tēnei kaupapa.
Hai te Upoko tuarima ka whakarerekēhia ngā marautanga ako kia tau ko te kaupapa ako i roto i ngā reo e rua ki roto i te kura. He whakautu tēnei i te kōrero a Richard Benton o te N.Z.C.E.R e kī ana, "Kāore e roa ka ngaro te reo Māori." Koinei te wā i whakapihihia ake ai te kaupapa ako i roto i ngā reo e rua, ā, ka tiritiria ko te kaupapa Rumaki Reo.
Hai te Upoko tuaono ko te kōhuretanga o te kaupapa Māori me te puāwaitanga o ngā hinengaro me ngā wairua o ngā tamariki ki te āhua o te ako i ā rātau mahi i roto i tō rātau ake reo. I tīmatahia te kaupapa i te tau 1977. Tae rawa atu ki ngā tau o muri mai kua kitea kē te huringa o ngā ngākau ki te ako.
Hai te Upoko tuawhitu ka whakaatahia mai ngā whakanekeneke i raro i tēnei kaupapa. He nui ngā tutukitanga ki ngā ture i te whakatūtanga o ngā Kura mō Āpōpō.
Hei whakarāpopototanga i ngā moemoeā me ngā tūmanako ka titiro ake ki ngā waru tekau tau kua pahemo. Kua turuki ki te pō, ki te ao. Kua noho te pukenga o te kupu kōrero, kua taipū ngā kaupapa. Ko taku mahi he whakarārangi i ngā pikinga i ngā hekenga i ngā āhuatanga katoa i mahia i roto i tēnei kura mai kore ka kitea atu he māramatanga he huarahi rānei e tiketike ake ai ngā mahi ako, ngā akoranga, ki ēnei o ā tātau mokopuna o Ngāi Tūhoe e tipu mai nei. Nō reira ka hoki rawa ngā kauhau ki ērā i whakatakotohia mai e ngā mātua tīpuna. Ka tīkina atu te kōrero i reira hai whakatinana i ngā tūmanako mō te wharekura o Ruatoki i tēnei wā.

text: Te kura o Ruatoki 1896 - 1979 Ko tēnei tuhinga roa e kōrero ana mō te Kura o Ruatoki i roto i te rohe o te iwi o Tūhoe. I whakatūria he kura i te tau 1896 i runga i te inoi a ngā Koroua ki te Kāwanatanga o taua wā.
Hai te Upoko tuatahi, ka whakatakotoria ngā kōrero mō te āhua o te whenua, ngā tāngata me ā rātau nekeneke. Tutū ana te puehu i runga i ngā whakatū waewae ki te iwi, ki te Pākehā hoki mō taua whenua.
Hai te Upoko tuarua ka takoto ngā kōrero mō te heke o ngā pānui o ngā inoi, ngā reta a ngā Koroua ki te Kāwanatanga mō te whakatū i tētahi Kura i Ruatoki. Te nuinga o ēnei rauemi i rangahaua, i kitea, i te Whare pukapuka o Pōneke. Ko ētahi i te Whare pukapuka o Tāmaki. Ka tau te tono, ka kitea te tūtukitanga o te ao Pākehā ki te ao Māori, otirā, kua puta te kaupapa i whakatūria ake ai te kura hei whakatangata whenua i ngā tāngata, i ngā aronga hinengaro Māori kia rite ki tō te Pākehā.
Hai te Upoko tuatoru ka tirohia ko ngā tuhinga a ngā Tumuaki mai i te tau 1896 ki te tau 1979 mō te Kura o Ruatoki. Ka kite i roto i ā rātau tirohanga te āhua o tā rātau kaihautū i te rerenga o te kaupapa nei. Ko ngā kaihautū i te waka nei, he tūmau noa nā te Kāwanatanga hai whakatō i te Pākehātanga ki roto i te whatumanawa Māori.
He tini o te whārua i hinga i roto i ēnei tau i runga i ngā mate urutī, mate tauhou i pā ki roto i te whārua. Ahakoa tērā ka tukuna tonu ngā tamariki ki te kura i runga i te whakapono he oranga ka puta mai i reira. I te tau 1946 ka tū he kura tuarua, he Māori District High School. Ko te nuinga o ngā tamariki o Tawera rāua ko Ruatoki i haere mai ki tēnei kura. Tokoiti ia tau i whiwhi karahipi mō te haere ki ngā kura hāhi o Tīpene rāua ko Wikitōria. Tērā pea he tango atu i ēnei tamariki mai i ngā āhuatanga Māori o te whārua.
Hai te upoko tuawhā, ka whakakorehia te kura tuarua. Ko ngā take mō te katinga ka āta whakamāramahia. He mahi nanakia nā te tari Mātauranga me āna āpiha i runga i ngā nekeneke mō tēnei kaupapa.
Hai te Upoko tuarima ka whakarerekēhia ngā marautanga ako kia tau ko te kaupapa ako i roto i ngā reo e rua ki roto i te kura. He whakautu tēnei i te kōrero a Richard Benton o te N.Z.C.E.R e kī ana, "Kāore e roa ka ngaro te reo Māori." Koinei te wā i whakapihihia ake ai te kaupapa ako i roto i ngā reo e rua, ā, ka tiritiria ko te kaupapa Rumaki Reo.
Hai te Upoko tuaono ko te kōhuretanga o te kaupapa Māori me te puāwaitanga o ngā hinengaro me ngā wairua o ngā tamariki ki te āhua o te ako i ā rātau mahi i roto i tō rātau ake reo. I tīmatahia te kaupapa i te tau 1977. Tae rawa atu ki ngā tau o muri mai kua kitea kē te huringa o ngā ngākau ki te ako.
Hai te Upoko tuawhitu ka whakaatahia mai ngā whakanekeneke i raro i tēnei kaupapa. He nui ngā tutukitanga ki ngā ture i te whakatūtanga o ngā Kura mō Āpōpō.
Hei whakarāpopototanga i ngā moemoeā me ngā tūmanako ka titiro ake ki ngā waru tekau tau kua pahemo. Kua turuki ki te pō, ki te ao. Kua noho te pukenga o te kupu kōrero, kua taipū ngā kaupapa. Ko taku mahi he whakarārangi i ngā pikinga i ngā hekenga i ngā āhuatanga katoa i mahia i roto i tēnei kura mai kore ka kitea atu he māramatanga he huarahi rānei e tiketike ake ai ngā mahi ako, ngā akoranga, ki ēnei o ā tātau mokopuna o Ngāi Tūhoe e tipu mai nei. Nō reira ka hoki rawa ngā kauhau ki ērā i whakatakotohia mai e ngā mātua tīpuna. Ka tīkina atu te kōrero i reira hai whakatinana i ngā tūmanako mō te wharekura o Ruatoki i tēnei wā.

year: 1998