title: Sports-related brain injury in the general population: An epidemiological study

authors: Theadom, Alice

subjects: Brain injury

abstract: Objectives
To determine the incidence, nature and severity of all sports-related brain injuries in the general population.

Design
Population-based epidemiological incidence study.

Methods
Data on all traumatic brain injury events sustained during a sports-related activity were extracted from a dataset of all new traumatic brain injury cases (both fatal and non-fatal), identified over a one-year period in the Hamilton and Waikato districts of New Zealand. Prospective and retrospective case ascertainment methods from multiple sources were used. All age groups and levels of traumatic brain injury severity were included. Details of the registering injuries and recurrent injuries sustained over the subsequent year were obtained through medical/accident records and assessment interviews with participants.

Results
Of 1369 incident traumatic brain injury cases, 291 were identified as being sustained during a sports-related activity (21% of all traumatic brain injuries) equating to an incidence rate of 170 per 100,000 of the general population. Recurrent injuries occurred more frequently in adults (11%) than children (5%). Of the sports-related injuries 46% were classified as mild with a high risk of complications. Injuries were most frequently sustained during rugby, cycling and equestrian activities. It was revealed that up to 19% of traumatic brain injuries were not recorded in medical notes.

Conclusions
Given the high incidence of new and recurrent traumatic brain injury and the high risk of complications following injury, further sport specific injury prevention strategies are urgently needed to reduce the impact of traumatic brain injury and facilitate safer engagement in sports activities. The high levels of ‘missed’ traumatic brain injuries, highlights the importance in raising awareness of traumatic brain injury during sports-related activity in the general population.

text: Sports-related brain injury in the general population: An epidemiological study Objectives
To determine the incidence, nature and severity of all sports-related brain injuries in the general population.

Design
Population-based epidemiological incidence study.

Methods
Data on all traumatic brain injury events sustained during a sports-related activity were extracted from a dataset of all new traumatic brain injury cases (both fatal and non-fatal), identified over a one-year period in the Hamilton and Waikato districts of New Zealand. Prospective and retrospective case ascertainment methods from multiple sources were used. All age groups and levels of traumatic brain injury severity were included. Details of the registering injuries and recurrent injuries sustained over the subsequent year were obtained through medical/accident records and assessment interviews with participants.

Results
Of 1369 incident traumatic brain injury cases, 291 were identified as being sustained during a sports-related activity (21% of all traumatic brain injuries) equating to an incidence rate of 170 per 100,000 of the general population. Recurrent injuries occurred more frequently in adults (11%) than children (5%). Of the sports-related injuries 46% were classified as mild with a high risk of complications. Injuries were most frequently sustained during rugby, cycling and equestrian activities. It was revealed that up to 19% of traumatic brain injuries were not recorded in medical notes.

Conclusions
Given the high incidence of new and recurrent traumatic brain injury and the high risk of complications following injury, further sport specific injury prevention strategies are urgently needed to reduce the impact of traumatic brain injury and facilitate safer engagement in sports activities. The high levels of ‘missed’ traumatic brain injuries, highlights the importance in raising awareness of traumatic brain injury during sports-related activity in the general population.

year: 2014

title: Axioms for function semigroups with agreement quasi-order

authors: Stokes, Tim E.

subjects: function semigroup

abstract: The agreement quasi-order on pairs of (partial) transformations on a set X is defined as follows: (f, g) ≼ (h, k) if whenever f, g are defined and agree, so do h, k. We axiomatize function semigroups and monoids equipped with this quasi-order, thereby providing a generalisation of first projection quasi-ordered ∩-semigroups of functions. As an application, axiomatizations are obtained for groups and inverse semigroups of injective functions equipped with the quasi-order of fix-set inclusion. All axiomatizations are finite.

text: Axioms for function semigroups with agreement quasi-order The agreement quasi-order on pairs of (partial) transformations on a set X is defined as follows: (f, g) ≼ (h, k) if whenever f, g are defined and agree, so do h, k. We axiomatize function semigroups and monoids equipped with this quasi-order, thereby providing a generalisation of first projection quasi-ordered ∩-semigroups of functions. As an application, axiomatizations are obtained for groups and inverse semigroups of injective functions equipped with the quasi-order of fix-set inclusion. All axiomatizations are finite.

year: 2011

title: The discovery of gold at Te Aroha and its consequences: January to October 1880

authors: Hart, Philip

abstract: By mid-1880, when there were expectations that gold would be found at Te Aroha, at last Ngati Rahiri permitted prospecting. A government-subsidized prospecting party under Hone Werahiko set out in early August and announced an apparently valuable find one month later. As the discovery was on Ngati Rahiri land, a goldfield could not be declared open immediately, but despite this increasing numbers of prospectors arrived. Newspapers were cautious, not wanting to encourage a rush based on nothing but rumours, some of them extravagant, notably one of finding ore that would produce 200oz to the ton. 
Despite being doubtful about the prospects, officials prepared to proclaim a new goldfield. In late October, good specimens were shown in Thames, encouraging more to leave both there and the Waikato to explore. After the warden inspected the ground where Werahiko had found gold, which was off limits to everyone except the original prospectors, he arranged to have the only test made before the field was opened. Although this gave an uncertain indication of whether the ore was payable, and little real work was being done outside the prospectors’ claim, regulations were devised permitting the proclamation of the new field.

text: The discovery of gold at Te Aroha and its consequences: January to October 1880 By mid-1880, when there were expectations that gold would be found at Te Aroha, at last Ngati Rahiri permitted prospecting. A government-subsidized prospecting party under Hone Werahiko set out in early August and announced an apparently valuable find one month later. As the discovery was on Ngati Rahiri land, a goldfield could not be declared open immediately, but despite this increasing numbers of prospectors arrived. Newspapers were cautious, not wanting to encourage a rush based on nothing but rumours, some of them extravagant, notably one of finding ore that would produce 200oz to the ton. 
Despite being doubtful about the prospects, officials prepared to proclaim a new goldfield. In late October, good specimens were shown in Thames, encouraging more to leave both there and the Waikato to explore. After the warden inspected the ground where Werahiko had found gold, which was off limits to everyone except the original prospectors, he arranged to have the only test made before the field was opened. Although this gave an uncertain indication of whether the ore was payable, and little real work was being done outside the prospectors’ claim, regulations were devised permitting the proclamation of the new field.

year: 2016