title: Ligand-stabilization of an unusual square-based pyramidal geometry of Cd(II) and Zn(II) in an heterometallic {MPt₂S₂} core (M = Cd, Zn)

authors: Li, Zhaohui

subjects: chemistry

abstract: Two heterometallic complexes, [Pt₂MCl(bipy)(PPh₃)₄(μ₃-S)₂][PF₆] (M = Zn, 2, Cd, 3) were synthesized from [Pt₂(PPh₃)₄(μ-S)₂] and characterized by single-crystal X-ray diffraction and electrospray ionization mass spectrometry. Two unusual square-based pyramidal (sbp) Zn(II) and Cd(II) structures are evident. VT 31P-{1H} NMR studies showed that 2 and 3 are fluxional at rt whereby rapid ligand exchange takes place by a non-dissociative mechanism. At intermediate temperatures, this motion slows down to a flipping movement of the {Pt₂S₂} ligand. At 183 K, all four phosphines are inequivalent in a distorted sbp model similar to that observed in the solid state. Nonlocal density functional theory calculations reveal that the formation of a trigonal bipyramidal intermediate in the fluxional process is favored over that of the tetrahedral species for both 2 and 3. The M–Cl (M = Zn, Cd) bonds are notably strong.

text: Ligand-stabilization of an unusual square-based pyramidal geometry of Cd(II) and Zn(II) in an heterometallic {MPt₂S₂} core (M = Cd, Zn) Two heterometallic complexes, [Pt₂MCl(bipy)(PPh₃)₄(μ₃-S)₂][PF₆] (M = Zn, 2, Cd, 3) were synthesized from [Pt₂(PPh₃)₄(μ-S)₂] and characterized by single-crystal X-ray diffraction and electrospray ionization mass spectrometry. Two unusual square-based pyramidal (sbp) Zn(II) and Cd(II) structures are evident. VT 31P-{1H} NMR studies showed that 2 and 3 are fluxional at rt whereby rapid ligand exchange takes place by a non-dissociative mechanism. At intermediate temperatures, this motion slows down to a flipping movement of the {Pt₂S₂} ligand. At 183 K, all four phosphines are inequivalent in a distorted sbp model similar to that observed in the solid state. Nonlocal density functional theory calculations reveal that the formation of a trigonal bipyramidal intermediate in the fluxional process is favored over that of the tetrahedral species for both 2 and 3. The M–Cl (M = Zn, Cd) bonds are notably strong.

year: 2000

title: Evaluation of an integrated paper and digital document management system

authors: Jervis, Matthew Geoffrey

subjects: computer science

abstract: Paper documents are still an integral component of our everyday working lives, and are likely to remain so for the foreseeable future. Fortunately, advances in electronic technology in recent years have made it possible to develop digital systems that better integrate paper and digital document management. However, as far as we are aware, none of these integrated document management systems have been evaluated to demonstrate whether the users would indeed find them valuable for managing paper documents. In this paper we present a user study of one such system, called SOPHYA, that provides a means of linking the management of real world document artefacts (e.g., folders) with their electronic counterparts, so that document management activities such as locating, retrieving, and filing documents can be better supported, especially for large collections. The study is in the form of a laboratory-based evaluation, in which participants with experience in document management used the system to perform several tasks, such as locating and retrieving folders, and provided feedback based on their own experience. The results of this study show that users are able to apply software functionality they use for storage and retrieval of electronic documents to effectively manage paper documents as well. Our study has also identified a range of other potential benefits that the users envisage for such a technology in their diverse work environments.

text: Evaluation of an integrated paper and digital document management system Paper documents are still an integral component of our everyday working lives, and are likely to remain so for the foreseeable future. Fortunately, advances in electronic technology in recent years have made it possible to develop digital systems that better integrate paper and digital document management. However, as far as we are aware, none of these integrated document management systems have been evaluated to demonstrate whether the users would indeed find them valuable for managing paper documents. In this paper we present a user study of one such system, called SOPHYA, that provides a means of linking the management of real world document artefacts (e.g., folders) with their electronic counterparts, so that document management activities such as locating, retrieving, and filing documents can be better supported, especially for large collections. The study is in the form of a laboratory-based evaluation, in which participants with experience in document management used the system to perform several tasks, such as locating and retrieving folders, and provided feedback based on their own experience. The results of this study show that users are able to apply software functionality they use for storage and retrieval of electronic documents to effectively manage paper documents as well. Our study has also identified a range of other potential benefits that the users envisage for such a technology in their diverse work environments.

year: 2011

title: A survey of psychologists’ opinions and behaviours on aspects of Maori mental health

authors: Sawrey, Richard

subjects: Maori

abstract: In the majority of settings where psychologists work, particularly in State health and justice settings, Maori people are substantially over represented relative to their numbers in the general population (Durie, 1987). This situation has raised serious questions about the adequacy of both mental health services and professionals in their provision of appropriate services for Maori people. (Hui Whakaoranga, 1984; Durie, 1985). Recommendations have been given to address these deficiencies. Te Hui Whakaoranga (l984) recommended a recruitment programme for Maori into health professions and training for health workers in Maori culture. The Committee of Inquiry into Procedures used in Psychiatric Hospitals (1988) pointed out that health professionals are rarely educated in taha Maori or the application of taha Maori to the service they provide. They stated that many current training programmes create a barrier to Maori people entering the health professions. They recommended that changes occur in both the in - service and basic training of health professionals.

text: A survey of psychologists’ opinions and behaviours on aspects of Maori mental health In the majority of settings where psychologists work, particularly in State health and justice settings, Maori people are substantially over represented relative to their numbers in the general population (Durie, 1987). This situation has raised serious questions about the adequacy of both mental health services and professionals in their provision of appropriate services for Maori people. (Hui Whakaoranga, 1984; Durie, 1985). Recommendations have been given to address these deficiencies. Te Hui Whakaoranga (l984) recommended a recruitment programme for Maori into health professions and training for health workers in Maori culture. The Committee of Inquiry into Procedures used in Psychiatric Hospitals (1988) pointed out that health professionals are rarely educated in taha Maori or the application of taha Maori to the service they provide. They stated that many current training programmes create a barrier to Maori people entering the health professions. They recommended that changes occur in both the in - service and basic training of health professionals.

year: 1993