Open Access. Powered by Scholars. Published by Universities.®

Social and Behavioral Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 1155

Full-Text Articles in Social and Behavioral Sciences

Forum Proceedings From “Uavs: Pros Vs Cons Symposium” In Toronto, Canada, June 2013, Katina Michael Feb 2014

Forum Proceedings From “Uavs: Pros Vs Cons Symposium” In Toronto, Canada, June 2013, Katina Michael

Associate Professor Katina Michael

Unmanned Aerial Systems (UAS), widely referred to as drones, are becoming increasingly relevant in civilian as well as military applications. UAS have been used by emergency services to help respond to and map environmental crises, to find missing people, to fight fires, and respond to traffic accidents. Their use in policing and border patrol functions is being trialled in many Western countries. Like other recent technologies (mobile phones etc), as they become cheaper and easier to use, they are likely to become much more prevalent in civilian life across a range of applications.

This conference will examine the current state ...


A Reagentless Thermal Post-Synthetic Rearrangement Of An Allyloxy-Tagged Metal-Organic Framework, Andrew D. Burrows, Sally O. Hunter, Mary F. Mahon, Christopher Richardson Jan 2013

A Reagentless Thermal Post-Synthetic Rearrangement Of An Allyloxy-Tagged Metal-Organic Framework, Andrew D. Burrows, Sally O. Hunter, Mary F. Mahon, Christopher Richardson

Faculty of Science - Papers (Archive)

Direct heating of a metal-organic framework provides a simple, controllable way of effecting a covalent post-synthetic modification. Herein we report that an allyloxy-tagged zinc metal-organic framework undergoes a thermally-promoted aromatic Claisen rearrangement through which the framework connectivity and porosity are maintained.


Induced Pluripotent Stem Cells As Tools For Disease Modelling And Drug Discovery In Alzheimer's Disease, Lezanne Ooi, Kuldip Sidhu, Anne Poljak, Greg Sutherland, Michael D. O'Connor, Perminder Sachdev, Gerald Munch Jan 2013

Induced Pluripotent Stem Cells As Tools For Disease Modelling And Drug Discovery In Alzheimer's Disease, Lezanne Ooi, Kuldip Sidhu, Anne Poljak, Greg Sutherland, Michael D. O'Connor, Perminder Sachdev, Gerald Munch

Faculty of Science - Papers (Archive)

Alzheimer’s disease (AD) is a progressive neurodegenerative brain disorder that leads to a progressive decline in a person’s memory and ability to communicate and carry out daily activities. The brain pathology in AD is characterized by extensive neuronal loss, particularly of cholinergic neurons, intracellular neurofibrillary tangles composed of the tau protein (NFTs) and extracellular deposition of plaques composed of β-amyloid (Aβ), a cleavage product of the amyloid precursor protein (APP). These two insoluble protein aggregates are accompanied by a chronic inflammatory response and extensive oxidative damage. Whereas dys-regulation of APP expression or processing appears to be important for ...


Ten Trenches: A Scienceart Collaboration, Timothy J. Cohen, Martin Cohen, Stephanie Kermode, Michael G. Leggett Jan 2013

Ten Trenches: A Scienceart Collaboration, Timothy J. Cohen, Martin Cohen, Stephanie Kermode, Michael G. Leggett

Faculty of Science - Papers (Archive)

Collaborative and cross-disciplinary research by a group of artists and scientists in an Australian rural setting generates data and ideas that form the basis of a wider understanding of the ramifications of global warming and cooling within the local, regional and national community. The work is viewed as an initial educational platform that will allow the public to see and understand the complexities of climate-based research.


Privacy Issues And Solutions In Social Network Sites, Xi Chen, Katina Michael Dec 2012

Privacy Issues And Solutions In Social Network Sites, Xi Chen, Katina Michael

Associate Professor Katina Michael

The boom of the internet and the explosion of new technologies have brought with them new challenges and thus new connotations of privacy. Clearly, when people deal with e-government and e-business, they do not only need the right to be let alone, but also to be let in secret. Not only do they need freedom of movement, but also to be assured of the secrecy of their information. Solove [6] has critiqued traditional definitions of privacy and argued that they do not address privacy issues created by new online technologies. Austin [7] also asserts: “[w]e do need to sharpen ...


Indian Millennials: Are Microchip Implants A More Secure Technology For Identification And Access Control?, Christine Perakslis, Katina Michael Oct 2012

Indian Millennials: Are Microchip Implants A More Secure Technology For Identification And Access Control?, Christine Perakslis, Katina Michael

Associate Professor Katina Michael

This mixed methods study with a sequential explanatory strategy explored qualitatively the statistically significant quantitative findings relative to Indian respondents’ perceptions about RFID (radio frequency identification) transponders implanted into the human body. In the first analysis phase of the study, there was a significant chi-square analysis reported (χ2 = 56.64, df = 3, p = .000) relative to the perception of small business owners (N = 453) that implanted chips are a more secure form of identification and/or access control in organizations and the respondents’ country of residence. Countries under study included Australia, India, the UK and US. The country contributing most ...


Bryophyte Species Composition Over Moisture Gradients In The Windmill Islands, East Antarctica: Development Of A Baseline For Monitoring Climate Change Impacts, J Wasley, S A. Robinson, J D. Turnbull, D H. King, W Wanek, M Popp Oct 2012

Bryophyte Species Composition Over Moisture Gradients In The Windmill Islands, East Antarctica: Development Of A Baseline For Monitoring Climate Change Impacts, J Wasley, S A. Robinson, J D. Turnbull, D H. King, W Wanek, M Popp

Faculty of Science - Papers (Archive)

Extreme environmental conditions prevail on the Antarctic continent and limit plant diversity to cryptogamic communities, dominated by bryophytes and lichens. Even small abiotic shifts, associated with climate change, are likely to have pronounced impacts on these communities that currently exist at their physiological limit of survival. Changes to moisture availability, due to precipitation shifts or alterations to permanent snow reserves, will most likely cause greatest impact. In order to establish a baseline for determining the effect of climate change on continental Antarctic terrestrial communities and to better understand bryophyte species distributions in relation to moisture in a floristically important Antarctic ...


The Value Of Government Mandated Location-Based Services In Emergencies In Australia, Anas Aloudat, Katina Michael, Roba Abbas, Mutaz Al-Debei Jul 2012

The Value Of Government Mandated Location-Based Services In Emergencies In Australia, Anas Aloudat, Katina Michael, Roba Abbas, Mutaz Al-Debei

Associate Professor Katina Michael

The adoption of mobile technologies for emergency management has the capacity to save lives. In Australia in February 2009, the Victorian Bushfires claimed 173 lives, the worst peace-time disaster in the nation’s history. The Australian government responded swiftly to the tragedy by going to tender for mobile applications that could be used during emergencies, such as mobile alerts and location services. These applications, which are becoming increasingly accurate with the evolution of positioning techniques, have the ability to deliver personalized information direct to the citizen during crises, complementing traditional broadcasting mediums like television and radio. Indeed governments have a ...


The Isolation Of Bioactive Flavonoids From Jacaranda Obtusifolia H. B. K. Ssp. Rhombifolia (G. F. W. Meijer) Gentry, Sorachai Khamsan, Saisunee Liawruangrath, Aphiwat Teerawutkulrag, Stephen G. Pyne, Mary J. Garson, Boonsom Liawruangrath Jun 2012

The Isolation Of Bioactive Flavonoids From Jacaranda Obtusifolia H. B. K. Ssp. Rhombifolia (G. F. W. Meijer) Gentry, Sorachai Khamsan, Saisunee Liawruangrath, Aphiwat Teerawutkulrag, Stephen G. Pyne, Mary J. Garson, Boonsom Liawruangrath

Faculty of Science - Papers (Archive)

The paper describes the bioassay-guided isolation, structure elucidation and anticancer evaluation of five flavonoids (-)-liquiritigenin (1), (-)-neoliquiritin (2), isoliquiritigenin (3), isoliquiritin (4) and formononetin (5) from the twigs of Jacaranda obtusifolia H. B. K. ssp. rhombifolia (G. F. W. Meijer) Gentry. The structures were elucidated based on 1H, 13C NMR, comprehensive 2D NMR, MS analyses and comparison with previously reported spectral data. Compounds 1 and 3 were demonstrated to be inhibitory in vitro against NCI-H187 (small cell lung cancer) with IC50 values of 30.1 and 16.6 μg mL-1, respectively. The isolates were non-cytotoxic to Vero cells (African green ...


Translocation Of The Eastern Bristlebird 1: Radio-Tracking Of Post-Release Movements, David Bain, Kris French, Jack Baker, Jean Clarke May 2012

Translocation Of The Eastern Bristlebird 1: Radio-Tracking Of Post-Release Movements, David Bain, Kris French, Jack Baker, Jean Clarke

Faculty of Science - Papers (Archive)

Translocating birds to a new area of habitat to restore or supplement depleted populations may pose a significant threat to the translocated individuals. While for many species, translocated individuals appear to move larger distances than resident animals, species with poor dispersal capacity may be restricted in movements and translocation methods may need to accommodate differences in movements to ensure success. In this study, designed to provide insights to inform our broader programme of translocations in New South Wales, Australia, we investigated post-release movements in the endangered, semi-flightless Eastern Bristlebird (Dasyornis brachypterus). We predicted that movements would be minimal, with few ...


Manufacturing On The Move? Beyond The High Dollar In The Debate About Making Things In Australia - The Case Of The Australian Surfboard Industry - Ausccer Discussion Paper No. 2012/2, Andrew Warren, Chris Gibson May 2012

Manufacturing On The Move? Beyond The High Dollar In The Debate About Making Things In Australia - The Case Of The Australian Surfboard Industry - Ausccer Discussion Paper No. 2012/2, Andrew Warren, Chris Gibson

Faculty of Science - Papers (Archive)

In October 2011 surfboard manufacturer BASE abruptly closed its factory on the Gold Coast resulting in the direct loss of 50 jobs. A few days later, nearby D’Arcy Surfboards also announced it was shedding workers and downsizing from a state-of-the art purpose built factory into a backyard workshop. Each business exported surfboards internationally and employed some of Australia’s best known surfboard-makers. The troubles facing these workshops added to those brewing at the very same in Australia’s steel, aluminium, automotive and garment industries. With renewed public debate and media commentary on the future of manufacturing, we now face ...


Commentary On: Mann, Steve (2012): Wearable Computing, Katina Michael, M.G. Michael Apr 2012

Commentary On: Mann, Steve (2012): Wearable Computing, Katina Michael, M.G. Michael

Associate Professor Katina Michael

In Professor Steve Mann- inventor, physicist, engineer, mathematician, scientist, designer, developer, project director, filmmaker, artist, instrumentalist, author, photographer, actor, activist- we see so much of the paradigmatic classical Greek philosopher. I recall asking Steve if technology shaped society or society shaped technology. He replied along the lines that the question was superfluous. Steve instead pointed to praxis, from which all theory, lessons or skills stem, are practiced, embodied and realized. Steve has always been preoccupied by the application of his ideas into form. In this way too, he can be considered a modern day Leonardo Da Vinci.


Book Review: Securing The Cloud: Cloud Computer Security Techniques And Tactics, Katina Michael Apr 2012

Book Review: Securing The Cloud: Cloud Computer Security Techniques And Tactics, Katina Michael

Associate Professor Katina Michael

With so much buzz around Cloud Computing, books like this one written by Winkler are much in demand. Winkler’s experience in the computing business shines through and as readers we are spoiled with a great deal of useful strategic information- a jam packed almost 300 page volume on securing the cloud.


In Memoriam: Associate Professor Dr Elaine Lawrence, Katina Michael Apr 2012

In Memoriam: Associate Professor Dr Elaine Lawrence, Katina Michael

Associate Professor Katina Michael

Despite being a graduate of the rigorous Bachelor of Information Technology at the University of Technology, Sydney (UTS) in 1996, I was unfortunate in that I missed being taught by Associate Professor Elaine Lawrence who began working at UTS in 1990 as a Lecturer in Computing Science. Dr Lawrence became a senior lecturer in 2000, and subsequently an associate professor in 2006. Our paths crossed in 2002 when I was tasked to deliver a new course entitled “eBusiness Principles” in my first year of lecturing at the University of Wollongong, and after an initial scurry to find an adequate textbook ...


Process-Evaluation Of Tropospheric Humidity Simulated By General Circulation Models Using Water Vapor Isotopologues: 1. Comparison Between Models And Observations, Camille Risi, David Noone, John Worden, Christian Frankenberg, Gabriele Stiller, Michael Kiefer, Bernd Funke, Kaley Walker, Peter Bernath, Matthias Schneider, Debra Wunch, Vanessa Sherlock, Nicholas M. Deutscher, David W. Griffith, Paul O. Wennberg, Kimberly Strong, Dan Smale, Emmanuel Mahieu, Sabine Barthlott, Frank Hase, Omar Garcia, Justus Notholt, Thorsten Warneke, Geoffrey Toon, David Sayres, Sandrine Bony, Jeonghoon Lee, Derek Brown, Ryu Uemura, Christophe Sturm Mar 2012

Process-Evaluation Of Tropospheric Humidity Simulated By General Circulation Models Using Water Vapor Isotopologues: 1. Comparison Between Models And Observations, Camille Risi, David Noone, John Worden, Christian Frankenberg, Gabriele Stiller, Michael Kiefer, Bernd Funke, Kaley Walker, Peter Bernath, Matthias Schneider, Debra Wunch, Vanessa Sherlock, Nicholas M. Deutscher, David W. Griffith, Paul O. Wennberg, Kimberly Strong, Dan Smale, Emmanuel Mahieu, Sabine Barthlott, Frank Hase, Omar Garcia, Justus Notholt, Thorsten Warneke, Geoffrey Toon, David Sayres, Sandrine Bony, Jeonghoon Lee, Derek Brown, Ryu Uemura, Christophe Sturm

Faculty of Science - Papers (Archive)

[1] The goal of this study is to determine how H2O and HDO measurements in water vapor can be used to detect and diagnose biases in the representation of processes controlling tropospheric humidity in atmospheric general circulation models (GCMs). We analyze a large number of isotopic data sets (four satellite, sixteen ground-based remote-sensing, five surface in situ and three aircraft data sets) that are sensitive to different altitudes throughout the free troposphere. Despite significant differences between data sets, we identify some observed HDO/H2O characteristics that are robust across data sets and that can be used to evaluate models. We ...


The Role Of Streptokinase As A Virulence Determinant Of Streptococcus Pyogenes - Potential For Therapeutic Targeting, Jason D. Mcarthur, Simon M. Cook, Carola Venturini, Mark J. Walker Mar 2012

The Role Of Streptokinase As A Virulence Determinant Of Streptococcus Pyogenes - Potential For Therapeutic Targeting, Jason D. Mcarthur, Simon M. Cook, Carola Venturini, Mark J. Walker

Faculty of Science - Papers (Archive)

Streptococcus pyogenes is a major human pathogen responsible for numerous diseases ranging from uncomplicated skin and throat infections to severe, life threatening invasive disease such as necrotising fasciitis and streptococcal toxic shock syndrome. These severe invasive infections progress rapidly and produce high rates of morbidity and mortality despite the implementation of aggressive treatment plans. The activation of plasminogen and the acquisition of plasmin activity at the bacterial cell surface is critical for the invasive pathogenesis of this organism. To facilitate this process, S. pyogenes secrete streptokinase, a potent plasminogen activating protein. Here, we describe the role of streptokinase in invasive ...


Seed Bank Persistence And Climate Change, Mark K. J Ooi Feb 2012

Seed Bank Persistence And Climate Change, Mark K. J Ooi

Faculty of Science - Papers (Archive)

"The strong mechanistic relationship between climatic factors and seed dormancy and germination suggests that forecast climatic changes will significantly affect seed bank persistence. This review focuses on the potential impact of changing temperature, rainfall and fire regimes on the longevity of long-term persistent seed-banks. Currently, there are few studies investigating the mechanistic responses of demographic processes, such as seed-bank dynamics, to forecast climate change. However, from the work that has been published, several key points have been highlighted. First, increased air temperatures will produce significantly higher soil temperatures in open and sparsely vegetated habitats. Some evidence shows that this could ...


Sousveillance And The Social Implications Of Point Of View Technologies In The Law Enforcement Sector, Katina Michael, M.G. Michael Feb 2012

Sousveillance And The Social Implications Of Point Of View Technologies In The Law Enforcement Sector, Katina Michael, M.G. Michael

Associate Professor Katina Michael

Policing today has become a high-tech affair; especially in the provision of incident event tracking and reporting systems increasingly being used to provide evidence in a court of law. These in-car video (ICV) and body worn recording systems are said to increase convictions and eliminate false claims made by defendants, providing documentary support to police officers and their associated actions in an incident. But today, new technologies such as smart phones equipped with cameras and global positioning system chipsets can also be found in the hands of the everyday citizen, used to capture everyday happenings and distributed to social networks ...


Book Review: Security Risk Management: Building An Information Security Risk Management Program From The Ground Up, Katina Michael Jan 2012

Book Review: Security Risk Management: Building An Information Security Risk Management Program From The Ground Up, Katina Michael

Associate Professor Katina Michael

In an age of outsourcing tasks that are not considered to be a core competency of the business, organisations have often relied on external consultants for matters pertaining to security. In actual fact, most companies could have utilized existing skill-sets in-house to produce a security risk management program, if only they knew what steps to take, and how to go about it all. Evan Wheeler in his book on information security risk management does just that- he equips professionals tasked with security, with the thinking required to create a program that is more preoccupied with the complex strategic-level questions than ...


Location Privacy Under Dire Threat As Uberveillance Stalks The Streets, Katina Michael, Roger Clarke Jan 2012

Location Privacy Under Dire Threat As Uberveillance Stalks The Streets, Katina Michael, Roger Clarke

Associate Professor Katina Michael

Location tracking and monitoring applications have proliferated with the arrival of smart phones that are equipped with onboard global positioning system (GPS) chipsets. It is now possible to locate a smart phone user down to 10 metres of accuracy on average. Innovators have been quick to capitalise on this emerging market by introducing novel pedestrian tracking technologies which can denote the geographic path of a mobile user. At the same time there is contention by law enforcement personnel over the need for a warrant process to track an individual in a public space. This paper considers the future of location ...


Architecture And Conservation Of The Bacterial Dna Replication Machinery, An Underexploited Drug Target, Andrew Robinson, Rebecca J. Causer, Nicholas E. Dixon Jan 2012

Architecture And Conservation Of The Bacterial Dna Replication Machinery, An Underexploited Drug Target, Andrew Robinson, Rebecca J. Causer, Nicholas E. Dixon

Faculty of Science - Papers (Archive)

"New antibiotics with novel modes of action are required to combat the growing threat posed by multi-drug resistant bacteria. Over the last decade, genome sequencing and other high-throughput techniques have provided tremendous insight into the molecular processes underlying cellular functions in a wide range of bacterial species. We can now use these data to assess the degree of conservation of certain aspects of bacterial physiology, to help choose the best cellular targets for development of new broad-spectrum antibacterials. DNA replication is a conserved and essential process, and the large number of proteins that interact to replicate DNA in bacteria are ...


Seasonal Field Metabolic Rate And Water Influx Of Captive-Bred Reintroduced Yellow-Footed Rock-Wallabies (Petrogale Xanthopus Celeris), Steven J. Lapidge, Adam J. Munn Jan 2012

Seasonal Field Metabolic Rate And Water Influx Of Captive-Bred Reintroduced Yellow-Footed Rock-Wallabies (Petrogale Xanthopus Celeris), Steven J. Lapidge, Adam J. Munn

Faculty of Science - Papers (Archive)

Captive breeding and release is a tool used by conservation biologists to re-establish populations of endangered or locally extinct species. Reintroduced animals that have been bred in captivity must learn to meet the challenges posed by free living, and to adjust to local environmental conditions, food and water sources. How well reintroduced animals might meet these challenges is uncertain as few longitudinal studies have investigated the physiology of reintroduced animals or the implications of this for successful establishment of new populations. Here we have evaluated long-term, seasonal energy and water use by reintroduced yellow-footed rock-wallabies (Petrogale xanthopus celeris), an endangered ...


Comparison Of Chemical Constituents And Antibacterial Activities And Antioxidant Activities Of The Essential Oil From Leaves And Fruits Of Bridelia Retusa (L.) A. Juss, D Sanseera, W Niwatananun, Saisunee Liawruangrath, Apiwat Baramee, Banyong Khantawa, Stephen G. Pyne, Boonsom Liawruangrath Jan 2012

Comparison Of Chemical Constituents And Antibacterial Activities And Antioxidant Activities Of The Essential Oil From Leaves And Fruits Of Bridelia Retusa (L.) A. Juss, D Sanseera, W Niwatananun, Saisunee Liawruangrath, Apiwat Baramee, Banyong Khantawa, Stephen G. Pyne, Boonsom Liawruangrath

Faculty of Science - Papers (Archive)

The essential oils from the leaves and fruits of Bridelia retusa (L.) A.Juss. were isolated by hydrodistillation. The essential oils were obtained in 0.0013% yield as a pale yellow liquid and 0.0026% yield as a violet-light brown liquid for the leaf oil and fruit oil respectively. The composition of each essential oil was analysed by means of GC-(FID) and GC-MS. Eleven constituents accounting for 48.77% of total leaves oil were identified. The most abundant compound was phytol (33.4%), followed by phthalic acid (5.2%), 6, 13-dimethoxy-2, 3, 9, 10-tetramethylpentacene-1, 4, 8, 11-tetrone (3.4 ...


Comment On The Ionization Energy Of B2f4, Bun Chan, Adam J. Trevitt, Stephen J. Blanksby, Leo Radom Jan 2012

Comment On The Ionization Energy Of B2f4, Bun Chan, Adam J. Trevitt, Stephen J. Blanksby, Leo Radom

Faculty of Science - Papers (Archive)

The Gn test sets(1) of accurate (uncertainty ≤ 1 kcal mol–1 ≈ 4 kJ mol–1) experimental data are widely employed in the development and assessment of quantum chemistry procedures. However, while all the data in the Gn sets nominally carry a sub-kcal mol–1 uncertainty, several of the experimental values show uncharacteristically large discrepancies when compared with values determined by high-level theoretical calculations. One of these questionable values is the adiabatic ionization energy (IE) of B2F4, for which the theoretical values calculated, for example, with the high-level G2 (1133.9, kJ mol–1),(1b) G3 (1135.4 kJ mol ...


Preparation Of Ordered Tio2 Macroporous Membrane Using Pbma Colloid Crystal As Template, Hongzhong Zhang, Feng Dong, Shengnan Zhai, Xuejing Kang, Shaoming Fang Jan 2012

Preparation Of Ordered Tio2 Macroporous Membrane Using Pbma Colloid Crystal As Template, Hongzhong Zhang, Feng Dong, Shengnan Zhai, Xuejing Kang, Shaoming Fang

Faculty of Science - Papers (Archive)

Poly(butyl methacrylate) (PBMA) colloidal crystal templates were assembled orderly on the clean substrates of monocrystalline silicon by dip-drawing technique and titanium dioxide (TiO2) macroporous membranes were prepared by using sol-dipping template method to fill the interstices among the PBMA templates, followed by calcination to remove the templates at 550℃. Calcination of the PBMA templates was carried out according to the following procedure: the rate of rising temperature was 5℃/min from room temperature to 150℃, 2℃/min from 150℃ to 270℃, 1℃ /min from 270℃ to 430℃, 2℃/min from 430℃ to 550℃ and maintained it at 550℃ for ...


A Pluvial Episode Identified In Arid Australia During The Medieval Climatic Anomaly, T J. Cohen, G C. Nanson, J D. Jansen, L A. Gliganic, J.-H May, J R. Larsen, I D. Goodwin, S Browning, D M. Price Jan 2012

A Pluvial Episode Identified In Arid Australia During The Medieval Climatic Anomaly, T J. Cohen, G C. Nanson, J D. Jansen, L A. Gliganic, J.-H May, J R. Larsen, I D. Goodwin, S Browning, D M. Price

Faculty of Science - Papers (Archive)

Optically stimulated luminescence (OSL) ages from a relict shoreline on Lake Callabonna record a major pluvial episode in southern central Australia between 1050 ± 70 and 1100 ± 60 Common Era (CE), within the Medieval Climatic Anomaly (MCA). During this pluvial interval Lake Callabonna filled to 10–12 times the volume of the largest historical filling (1974) and reached maximum depths of 4–5 m, compared to the 0.5–1.0 m achieved today. Until now there has been no direct evidence for the MCA in the arid interior of Australia. A multi-proxy, analogue-based atmospheric circulation reconstruction indicates that the pluvial ...


The Synthesis, Structures And Reactions Of Zinc And Cobalt Metal-Organic Frameworks Incorporating An Alkyne-Based Dicarboxylate Linker, Andrew D. Burrows, L C. Fisher, David M. Hodgson, Mary F. Mahon, Naomi Cessford, Tina Duren, Christopher Richardson, S P. Rigby Jan 2012

The Synthesis, Structures And Reactions Of Zinc And Cobalt Metal-Organic Frameworks Incorporating An Alkyne-Based Dicarboxylate Linker, Andrew D. Burrows, L C. Fisher, David M. Hodgson, Mary F. Mahon, Naomi Cessford, Tina Duren, Christopher Richardson, S P. Rigby

Faculty of Science - Papers (Archive)

The reaction of zinc(II) nitrate and 4,4′-ethynylenedibenzoic acid (H2edb) in DMF at 80 °C gave the metal–organic framework material [Zn4O(edb)3(H2O)2]·6DMF 1 in which edb ligands connect Zn4O centres into a doubly-interpenetrated cubic network with a similar topology to observed with other linear dicarboxylates in the IRMOF series. Analysis of the nitrogen isotherm revealed the material to have a BET surface area of 1088 m2 g−1, which is approximately one-third of the value calculated from GCMC simulations, suggesting incomplete activation or pore ...


Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph Jan 2012

Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph

Faculty of Science - Papers (Archive)

The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded self-supporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 ± 20 and 220 ± 60 S cm−1, while contact angle analysis revealed they all possessed ...


Remote Sensing Of Co2 And Ch4 Using Solar Absorption Spectrometry With A Low Resolution Spectrometer, C Petri, T Warneke, N Jones, T Ridder, J Messerschmidt, T Weinzierl, M Geibel, J Notholt Jan 2012

Remote Sensing Of Co2 And Ch4 Using Solar Absorption Spectrometry With A Low Resolution Spectrometer, C Petri, T Warneke, N Jones, T Ridder, J Messerschmidt, T Weinzierl, M Geibel, J Notholt

Faculty of Science - Papers (Archive)

Throughout the last few years solar absorption Fourier Transform Spectrometry (FTS) has been further developed to measure the total columns of CO2 and CH4. The observations are performed at high spectral resolution, typically at 0.02 cm(-1). The precision currently achieved is generally better than 0.25%. However, these high resolution instruments are quite large and need a dedicated room or container for installation. We performed these observations using a smaller commercial interferometer at its maximum possible resolution of 0.11 cm(-1). The measurements have been performed at Bremen and have been compared to observations using our high ...


Observed And Simulated Time Evolution Of Hcl, Clono2, And Hf Total Column Abundances, R Kohlhepp, R Ruhnke, M P Chipperfield, M De Maziere, J Notholt, S Barthlott, R L. Batchelor, R D. Blatherwick, Th Blumenstock, M T. Coffey, P Demoulin, H Fast, W Feng, A Goldman, D W. T Griffith, K Hamann, J W. Hannigan, F Hase, N B. Jones, A Kagawa, I Kaiser, Y Kasai, O Kirner, W Kouker, R Lindenmaier, E Mahieu, R L. Mittermeier, B Monge-Sanz, I Morino, I Murata, H Nakajima, M Palm, Clare Paton-Walsh, U Raffalski, Th Reddmann, M Rettinger, C P. Rinsland, E Rozanov, M Schneider, C Senten, C Servais, B M. Sinnhuber, D Smale, K Strong, R Sussmann, J R. Taylor, G Vanhaelewyn, T Warneke, C Whaley, M Wiehle, S W. Wood Jan 2012

Observed And Simulated Time Evolution Of Hcl, Clono2, And Hf Total Column Abundances, R Kohlhepp, R Ruhnke, M P Chipperfield, M De Maziere, J Notholt, S Barthlott, R L. Batchelor, R D. Blatherwick, Th Blumenstock, M T. Coffey, P Demoulin, H Fast, W Feng, A Goldman, D W. T Griffith, K Hamann, J W. Hannigan, F Hase, N B. Jones, A Kagawa, I Kaiser, Y Kasai, O Kirner, W Kouker, R Lindenmaier, E Mahieu, R L. Mittermeier, B Monge-Sanz, I Morino, I Murata, H Nakajima, M Palm, Clare Paton-Walsh, U Raffalski, Th Reddmann, M Rettinger, C P. Rinsland, E Rozanov, M Schneider, C Senten, C Servais, B M. Sinnhuber, D Smale, K Strong, R Sussmann, J R. Taylor, G Vanhaelewyn, T Warneke, C Whaley, M Wiehle, S W. Wood

Faculty of Science - Papers (Archive)

Time series of total column abundances of hydrogen chloride (HCl), chlorine nitrate (ClONO2), and hydrogen fluoride (HF) were determined from ground-based Fourier transform infrared (FTIR) spectra recorded at 17 sites belonging to the Network for the Detection of Atmospheric Composition Change (NDACC) and located between 80.05° N and 77.82° S. By providing such a near-global overview on ground-based measurements of the two major stratospheric chlorine reservoir species, HCl and ClONO2, the present study is able to confirm the decrease of the atmospheric inorganic chlorine abundance during the last few years. This decrease is expected following the 1987 Montreal ...