title: Online social networks: an emergent recruiter tool for attracting and screening

authors: Ollington, Nickolas

subjects: networks

abstract: Purpose – The increased popularity in using online social networks by recruiters has received much positive attention, particularly in the popular press. Using social network theory this paper aims to examine how the structure and governance mechanisms of these networks can assist this process. The authors ask: how do recruiters use online social networks to effectively attract and screen prospective job applicants? 
Design/methodology/approach – The semi-structured interview approach is used to gather data from 25 recruitment specialists. 
Findings – The connector role is identified as a specific attraction mechanism recruiters use to create numerous weak ties, where some are so weak they barely constitute ties at all. The authors then identify branding, transparency and data specificity as three mechanisms recruiters use to strengthen these ties when performing the attracting and screening functions. 
Originality/value – This is the first paper to analyse online recruitment, using social network theory, and hence it has important implications for both academic and practitioner audiences involved in recruitment.

text: Online social networks: an emergent recruiter tool for attracting and screening Purpose – The increased popularity in using online social networks by recruiters has received much positive attention, particularly in the popular press. Using social network theory this paper aims to examine how the structure and governance mechanisms of these networks can assist this process. The authors ask: how do recruiters use online social networks to effectively attract and screen prospective job applicants? 
Design/methodology/approach – The semi-structured interview approach is used to gather data from 25 recruitment specialists. 
Findings – The connector role is identified as a specific attraction mechanism recruiters use to create numerous weak ties, where some are so weak they barely constitute ties at all. The authors then identify branding, transparency and data specificity as three mechanisms recruiters use to strengthen these ties when performing the attracting and screening functions. 
Originality/value – This is the first paper to analyse online recruitment, using social network theory, and hence it has important implications for both academic and practitioner audiences involved in recruitment.

year: 2013

title: Supercapacitor assisted power converter for DC microgrid applications with self-contained DC-UPS capability

authors: Hu, Yang

subjects: DC microgrid

abstract: Nowadays, due to the advantages inherent in using renewable energy, renewable power generation is becoming established worldwide. Direct current (DC) microgrid systems, which have been proposed as alternatives for traditional alternating current (AC) networks, enable the introduction of a large amount of solar energy by using distributed photovoltaic generation units. Meanwhile, small-scale DC microgrid systems designed at the household level are also viable options used to harness renewable energy (like solar energy) and have broad development prospects.
One of the ‘hot topics’ in the field of renewable energies is how to make efficient use of this type of energy. In this thesis, a high-efficiency DC microgrid system with supercapacitor (SC)-assisted power converter is introduced as a way to harness solar energy to run a 12 V, 50 W household lighting system.
Supercapacitor-assisted low dropout regulator (SCALDO) techniques were used to build an SC-assisted converter for a DC microgrid system. Supercapacitors in the DC microgrid acted as voltage droppers to convert 24 V solar panel’s output to 11 V – 13 V. Supercapacitors were also used as energy storage devices, and performed as a power source to run the household lighting system for a period of time after a sudden mains power outage.
Real weather condition data, including local Hamilton illuminance values, were required to design this system. These data were measured at the University of Waikato. They were converted into irradiance data and were used to create similar patterns for simulation. Prototype circuit of the complete DC microgrid system, with an SC-assisted converter was also developed and shown at the end of the thesis.

text: Supercapacitor assisted power converter for DC microgrid applications with self-contained DC-UPS capability Nowadays, due to the advantages inherent in using renewable energy, renewable power generation is becoming established worldwide. Direct current (DC) microgrid systems, which have been proposed as alternatives for traditional alternating current (AC) networks, enable the introduction of a large amount of solar energy by using distributed photovoltaic generation units. Meanwhile, small-scale DC microgrid systems designed at the household level are also viable options used to harness renewable energy (like solar energy) and have broad development prospects.
One of the ‘hot topics’ in the field of renewable energies is how to make efficient use of this type of energy. In this thesis, a high-efficiency DC microgrid system with supercapacitor (SC)-assisted power converter is introduced as a way to harness solar energy to run a 12 V, 50 W household lighting system.
Supercapacitor-assisted low dropout regulator (SCALDO) techniques were used to build an SC-assisted converter for a DC microgrid system. Supercapacitors in the DC microgrid acted as voltage droppers to convert 24 V solar panel’s output to 11 V – 13 V. Supercapacitors were also used as energy storage devices, and performed as a power source to run the household lighting system for a period of time after a sudden mains power outage.
Real weather condition data, including local Hamilton illuminance values, were required to design this system. These data were measured at the University of Waikato. They were converted into irradiance data and were used to create similar patterns for simulation. Prototype circuit of the complete DC microgrid system, with an SC-assisted converter was also developed and shown at the end of the thesis.

year: 2017

title: Evidence for late polynesian colonization of New Zealand: University of Waikato radiocarbon measurements

authors: Hogg, Alan G.

subjects: radiocarbon

abstract: We present radiocarbon determinations for 271 New Zealand archaeological samples measured at the University of Waikato Radiocarbon Dating Laboratory between 1975 and 1995. A discard protocol is applied to the series and the list culled to winnow the acceptable dates from those that may incorporate error. None of the 221 acceptable ¹⁴C determinations older than 600 BP (in the case of terrestrial samples) or 930 BP (in the case of marine and estuarine shell) extends beyond cal AD 1250. This conclusion supports the short chronology model of New Zealand prehistory presented by Anderson (1991).

text: Evidence for late polynesian colonization of New Zealand: University of Waikato radiocarbon measurements We present radiocarbon determinations for 271 New Zealand archaeological samples measured at the University of Waikato Radiocarbon Dating Laboratory between 1975 and 1995. A discard protocol is applied to the series and the list culled to winnow the acceptable dates from those that may incorporate error. None of the 221 acceptable ¹⁴C determinations older than 600 BP (in the case of terrestrial samples) or 930 BP (in the case of marine and estuarine shell) extends beyond cal AD 1250. This conclusion supports the short chronology model of New Zealand prehistory presented by Anderson (1991).

year: 1997