title: Feedback-based gameplay metrics: Measuring player experience via automatic visual analysis

authors: Marczak, Raphaël

subjects: gameplay experience

abstract: Using gameplay metrics to articulate player interaction within game systems has received increased interest in game studies. The value of gameplay metrics comes from a desire to empirically validate over a decade of theorization of player experience and knowledge of games as ludic systems. Taking gameplay metrics beyond formalized user testing (i.e. with the aim of improving a product) allows researchers the freedom of examining any commercially available game without the need to have access to the game's source code. This paper offers a new methodology to obtain data on player behavior, achieved through analyzing video and audio streams. Game interface features are being analyzed automatically, which are indicative of player behavior and gameplay events. This paper outlines the development of this methodology and its application to research that seeks to understand the nature of engagement and player motivations.

text: Feedback-based gameplay metrics: Measuring player experience via automatic visual analysis Using gameplay metrics to articulate player interaction within game systems has received increased interest in game studies. The value of gameplay metrics comes from a desire to empirically validate over a decade of theorization of player experience and knowledge of games as ludic systems. Taking gameplay metrics beyond formalized user testing (i.e. with the aim of improving a product) allows researchers the freedom of examining any commercially available game without the need to have access to the game's source code. This paper offers a new methodology to obtain data on player behavior, achieved through analyzing video and audio streams. Game interface features are being analyzed automatically, which are indicative of player behavior and gameplay events. This paper outlines the development of this methodology and its application to research that seeks to understand the nature of engagement and player motivations.

year: 2012-07-21

title: Supercapacitor-assisted refrigerator for DC powered households

authors: Sirimanne, Don Charles Themiya

abstract: Energy efficiency is a prime concern in power generation as well as in usage. Product developers and end users are encouraged to reduce their carbon footprint for help in the fight against climate change. In this effect designing power electronic systems with high end to end efficiency is paramount. Direct DC application with tactical circuit topologies show promising results for improved efficiency gains resulting in increased attention for the DC microgrid concept. DC powered households are developed, where solar photovoltaics on rooftops generate purely DC electricity to power the immediate community. Recent developments have made solar generation quite economical for this to be realized. Unfortunately, solar power is not consistent due to environmental factors, thus needing an alternate DC source or energy storage for uninterrupted supply of power. To meet this demand research into energy storage has ramped up. As a result, supercapacitor technology has advanced considerably with superior characteristics compared to rechargeable batteries. Almost all modern white goods run on DC internally. The inverter-based refrigerator operates using a variable frequency inverter for efficient and smooth operation. The refrigerator has shown to function efficiently within a range around the nominal operating voltage. This has allowed the application of the well matured supercapacitor assisted loss management (SCALoM) technique to develop a power converter to operate the refrigerator with the characteristic DC power supply of a solar photovoltaic (PV) array. The system benefits from the replacement of the battery and Maximum Power Point Tracking (MPPT) Charge controller with supercapacitors for a solar power system with long operation time in between of service intervals. While MPPT charge controller is based on a high frequency switch mode DC-DC converter, the proposed power converter allows for switching frequencies in the mHz region, allowing lower switching losses and reduction in potential electromagnetic interference and radio frequency interference. The concept was proven by using a 24V DC camping fridge and obtaining an efficiency of up to 94%. This work will lead to the development of the converter for a consumer grade 240Vac inverter driven refrigerator where the AC-DC converter is bypassed to achieve improved efficiency. This thesis covers the broader design and technical aspects of the power converter.

text: Supercapacitor-assisted refrigerator for DC powered households Energy efficiency is a prime concern in power generation as well as in usage. Product developers and end users are encouraged to reduce their carbon footprint for help in the fight against climate change. In this effect designing power electronic systems with high end to end efficiency is paramount. Direct DC application with tactical circuit topologies show promising results for improved efficiency gains resulting in increased attention for the DC microgrid concept. DC powered households are developed, where solar photovoltaics on rooftops generate purely DC electricity to power the immediate community. Recent developments have made solar generation quite economical for this to be realized. Unfortunately, solar power is not consistent due to environmental factors, thus needing an alternate DC source or energy storage for uninterrupted supply of power. To meet this demand research into energy storage has ramped up. As a result, supercapacitor technology has advanced considerably with superior characteristics compared to rechargeable batteries. Almost all modern white goods run on DC internally. The inverter-based refrigerator operates using a variable frequency inverter for efficient and smooth operation. The refrigerator has shown to function efficiently within a range around the nominal operating voltage. This has allowed the application of the well matured supercapacitor assisted loss management (SCALoM) technique to develop a power converter to operate the refrigerator with the characteristic DC power supply of a solar photovoltaic (PV) array. The system benefits from the replacement of the battery and Maximum Power Point Tracking (MPPT) Charge controller with supercapacitors for a solar power system with long operation time in between of service intervals. While MPPT charge controller is based on a high frequency switch mode DC-DC converter, the proposed power converter allows for switching frequencies in the mHz region, allowing lower switching losses and reduction in potential electromagnetic interference and radio frequency interference. The concept was proven by using a 24V DC camping fridge and obtaining an efficiency of up to 94%. This work will lead to the development of the converter for a consumer grade 240Vac inverter driven refrigerator where the AC-DC converter is bypassed to achieve improved efficiency. This thesis covers the broader design and technical aspects of the power converter.

year: 2023

title: Na Tarimo i whakaari... Ko Rangiwewehi te iwi

authors: Flavell, James William Ben

abstract: Ko ngā kōrero e whai ake nei, he mea kohikohi, he mea tuku mai ki ahau mō te iwi e kiia nei, ko Ngāti Rangiwewehi. Ko te rohe ki te taha raki o te Rotorua-nui-ā-kahumatamomoe to tūrangawaewae, otirā the rohe takahi o te iwi nei, i ngā rā o mua, nā, ahakoa he nui te whenua kua ngaro atu, kei konei tonu te papa kāinga mō tēnei karangatanga o Te Arawa waka, kei konei hoki tōna mauri, tōna mana, tōna wehi.
Ko Ngāti Rangiwehei i ēnei rā, e rite tonu ana ki te tōtara nui. I tipu ake tēnei tōtara i te kākano i ruia i Rangiātea arā, i Hawaiki, i mānu mai ki Aotearoa nei, i puāwai mai, ā, kei te tipu tonu, kei te tuipu tonu.
Nā, kei roto i tēnei rākau, ko ngā kōrero katoa mō te iwi nei, arā ko ngā whakapapa, ko ngā waiata ko ngā karakia, ko ngā pakiwaitara otirā ko ngā āhuatanga katoa e pā ana ki te iwi. Kei konei hoki ko te ira o te tangata e mau nei i ēnei āhuatanga nei.
Ka tae ki te ngahuru, ka heke iho ngā rau rākau ka pirau, ka ngaro. Pēnei i te rākau nei, te hinga te tangata, ka kapohia e te ringa o Aituā, ā, ka ngaro. Ēhara i te mea ko te mauri o te tangata anake te mea e ngaro nei, ēngari, ko ōna mātauranga katoa hoki.
Nā, matemate noa atu ngā koroua me ngākuia e mōhio tūturu ana ki ngā kōrero hōhonu tuku iho a Ngāti Rangiwewehi. Nō reira, ko tāku mahi, he kohi i ēnei kōrero, i mua i te ngaronga tonutanga o ngā kaumātua e ora ana, nei ngaro.
Kua kohia nei e au ngā kōrero katoa ahakoa Māori ahakoa Pākehā, kia kitea ai, kia mārama ake ai ngā momo āhuatanga o tōku iwi.
Ēhara tēnei i te me ngāwari, nō te mea, ko tēnei mea te mātaranga ahakoa he whakapapa rānei, he pakiwaitara rānei, he mea tino tapu ki te Māori, i te ao tawhito, ā, kei te pērā anō hoki i ēnei rā. Kua oti te tārai te tāhū o tēnei tuhituhinga e kore a taea te whakatārewa tēnei tāhū mehemea kāore, ōna pou kāore ōna here e tika ana. Otirā e kore e tū te whare kōreo, te tāhū whakaringa kōereo, mehemea kāore ōna kaupapa whenua, tangata, tae atu ki a Papatūānuku. Nō reira, koia tēnei ka tātaihia ake ngā kupu kōreroa muri ake nei, kia tutuki ai ngā tūmanako ngā wawata, a ngā whakatipuranga, mai, mai, mai i te pō ki ngā kaikōrero me te kaituhi.
E ai ki te iwi, ko Rangiwewehi te tipuna o tēnei iwi te tamaiti a Tawakeheimoa rāua ko Te Aongahoro.
Nā te mea, he karangatanga a Ngāti Rangiwewehi nō Te Arawa waka i hoki atu ai au ki ngā kōrero mō tēnei waka tapu. Tae rawa mai tēnei waka ki tēnei whenua, ka horapa hāere ngā tāngata i te mata o te whenua. I tōna wā, i tae atu ngā tīpuna ke Te Awahou awa, otirā ki te taha raki o Rotorua moana. Mai i taua wā, ka tīmata ngā āhuatanga katoa e pā ana ki tēnei iwi.
Nā, ēhara tēnei tuhinga i te pukapuka hei whakaatu i te tūturutanga o ngā kōrero katoa o Ngāti Rangiwewehi, mā Ngāti Rangiwewehi hei whai atu, ēngari he kōrero kua kohia nei e au i ngā rangatira, i ngā tohunga, i ngā tāngata mōhio, i ngā whāea, i ngā kaumātua me ngā pukapuka a ngā Māori me ngā Pākehā.
He pūtake kōrero noa iho tēnei mō Ngāti Rangiwewehi he tohu whakamaharatanga hoki ki ngā tīpuna, ki ngā mātua kua wehe atu nei ki te pō.

text: Na Tarimo i whakaari... Ko Rangiwewehi te iwi Ko ngā kōrero e whai ake nei, he mea kohikohi, he mea tuku mai ki ahau mō te iwi e kiia nei, ko Ngāti Rangiwewehi. Ko te rohe ki te taha raki o te Rotorua-nui-ā-kahumatamomoe to tūrangawaewae, otirā the rohe takahi o te iwi nei, i ngā rā o mua, nā, ahakoa he nui te whenua kua ngaro atu, kei konei tonu te papa kāinga mō tēnei karangatanga o Te Arawa waka, kei konei hoki tōna mauri, tōna mana, tōna wehi.
Ko Ngāti Rangiwehei i ēnei rā, e rite tonu ana ki te tōtara nui. I tipu ake tēnei tōtara i te kākano i ruia i Rangiātea arā, i Hawaiki, i mānu mai ki Aotearoa nei, i puāwai mai, ā, kei te tipu tonu, kei te tuipu tonu.
Nā, kei roto i tēnei rākau, ko ngā kōrero katoa mō te iwi nei, arā ko ngā whakapapa, ko ngā waiata ko ngā karakia, ko ngā pakiwaitara otirā ko ngā āhuatanga katoa e pā ana ki te iwi. Kei konei hoki ko te ira o te tangata e mau nei i ēnei āhuatanga nei.
Ka tae ki te ngahuru, ka heke iho ngā rau rākau ka pirau, ka ngaro. Pēnei i te rākau nei, te hinga te tangata, ka kapohia e te ringa o Aituā, ā, ka ngaro. Ēhara i te mea ko te mauri o te tangata anake te mea e ngaro nei, ēngari, ko ōna mātauranga katoa hoki.
Nā, matemate noa atu ngā koroua me ngākuia e mōhio tūturu ana ki ngā kōrero hōhonu tuku iho a Ngāti Rangiwewehi. Nō reira, ko tāku mahi, he kohi i ēnei kōrero, i mua i te ngaronga tonutanga o ngā kaumātua e ora ana, nei ngaro.
Kua kohia nei e au ngā kōrero katoa ahakoa Māori ahakoa Pākehā, kia kitea ai, kia mārama ake ai ngā momo āhuatanga o tōku iwi.
Ēhara tēnei i te me ngāwari, nō te mea, ko tēnei mea te mātaranga ahakoa he whakapapa rānei, he pakiwaitara rānei, he mea tino tapu ki te Māori, i te ao tawhito, ā, kei te pērā anō hoki i ēnei rā. Kua oti te tārai te tāhū o tēnei tuhituhinga e kore a taea te whakatārewa tēnei tāhū mehemea kāore, ōna pou kāore ōna here e tika ana. Otirā e kore e tū te whare kōreo, te tāhū whakaringa kōereo, mehemea kāore ōna kaupapa whenua, tangata, tae atu ki a Papatūānuku. Nō reira, koia tēnei ka tātaihia ake ngā kupu kōreroa muri ake nei, kia tutuki ai ngā tūmanako ngā wawata, a ngā whakatipuranga, mai, mai, mai i te pō ki ngā kaikōrero me te kaituhi.
E ai ki te iwi, ko Rangiwewehi te tipuna o tēnei iwi te tamaiti a Tawakeheimoa rāua ko Te Aongahoro.
Nā te mea, he karangatanga a Ngāti Rangiwewehi nō Te Arawa waka i hoki atu ai au ki ngā kōrero mō tēnei waka tapu. Tae rawa mai tēnei waka ki tēnei whenua, ka horapa hāere ngā tāngata i te mata o te whenua. I tōna wā, i tae atu ngā tīpuna ke Te Awahou awa, otirā ki te taha raki o Rotorua moana. Mai i taua wā, ka tīmata ngā āhuatanga katoa e pā ana ki tēnei iwi.
Nā, ēhara tēnei tuhinga i te pukapuka hei whakaatu i te tūturutanga o ngā kōrero katoa o Ngāti Rangiwewehi, mā Ngāti Rangiwewehi hei whai atu, ēngari he kōrero kua kohia nei e au i ngā rangatira, i ngā tohunga, i ngā tāngata mōhio, i ngā whāea, i ngā kaumātua me ngā pukapuka a ngā Māori me ngā Pākehā.
He pūtake kōrero noa iho tēnei mō Ngāti Rangiwewehi he tohu whakamaharatanga hoki ki ngā tīpuna, ki ngā mātua kua wehe atu nei ki te pō.

year: 1986