Polarizability of molecular hydrogen

Static dipole electric polarizabilities of molecular hydroge

Magnetic states and optical properties of single-layer carbon-doped hexagonal boron nitride

We show that carbon-doped hexagonal boron nitride (h-BN) has extraordinary properties with many possible applications. We demonstrate that the substitution-induced impurity states, associated with carbon atoms, and their interactions dictate the electronic structure and properties of C-doped h-BN. Furthermore, we show that stacking of localized impurity states in small C clusters embedded in h-BN forms a set of discrete energy levels in the wide gap of h-BN. The electronic structures of these C clusters have a plethora of applications in optics, magneto-optics, and opto-electronics

Synthesis, characterisation and biological activity of gold(III) catecholate and related complexes

The reactions of the cyclometallated gold(III) complexes [LAuCl₂] [L=2-(dimethylaminomethyl)phenyl, 2-benzylpyridyl or 2-anilinopyridyl] with catechol, tetrachlorocatechol, or the cyclic α,β-diketone SCH(CO2Et)C(O)C(O)CH(CO2Et) give stable complexes containing five-membered Au-O-C-C-O rings. These represent the first examples of well-characterised gold(III) catecholate complexes. Similarly, reactions with 2-acetamidophenol [HOC₆H₄NHC(O)CH₃] give complexes with the related Au---N---C---C---O ring. The complexes were characterised by NMR spectroscopy, electrospray ionisation mass spectrometry, elemental microanalysis, and in the case of the complex [(2-benzylpyridyl)Au{OC₆H₄NC(O)CH₃}] by an X-ray crystal structure determination. Several complexes show high activity towards P388 murine leukemia cells

Osteoporosis screening and risk management

Osteoporosis is common among older adults and results in costly osteoporotic fractures. Screening for this metabolic bone disorder is warranted in most older adults and clinicians must be diligent in identifying persons at risk. The evaluation should include an assessment of risk factors for falls, a bone density test, and consideration of possible secondary causes of osteoporosis. Several medications are available to improve bone density and decrease fractures. Adequate calcium and vitamin D intake (and treatment of vitamin D deficiency) are paramount in the management of osteoporosis

The acute radiation syndrome in large domestic animals with special reference to x- irradiation in goats

The author has interested himself in nuclear science especially as it affects veterinary medical matters for over fifteen years. He attended many Service courses on the subject and has written a number of theoretical articles. (Wilkins 1949, 1955, 1956, 1957, 1959).In 1960 he was posted to the Radiobiological Research Unit of the Medical Research Council at Harwell to help in a project to discover the effects of neutrons using large animals as the test subjects. His specific task was to acquire and maintain in health a large colony of goats. He took the opportunity to study some of the effects of X- irradiation on these animals and, in a very small measure, to put theory into practice.The study was divided into two sections : SECTION I was a general review of the acute radiation syndrome in domestic animals. SECTION II consisted of general observations on a colony of goats together with an investigation into certain aspects of the effects of X- irradiation on adult goats.The main significance of the work is in the fact that this is the first recording of data of the effects of whole body irradiation on a larger ruminant domestic animal in the United Kingdom. The general pattern of the findings is similar in most respects to that manifested by other animal species

An impact assessment of current rural Alaska village solid waste management systems: a case study

Thesis (M.S.) University of Alaska Fairbanks, 2016The purpose of this study is to examine the impacts of current and alternative solid waste management practices of two rural Alaskan villages. The EASETECH life-cycle assessment modeling tool was used to compare the current solid waste management systems for the remote villages of Kalskag and Fort Yukon across eight alternative scenarios. Annual waste generation and composition data for these two villages and data specific to processes and functions for each waste system were collected and used to modify templates within the EASETECH program to provide a life-cycle assessment for current and proposed waste management practices. The results indicate that integrated waste management practices for these remote villages may not be economically feasible or environmentally favorable. Waste management options, though limited for these remote villages, may benefit from minor system changes. These changes include transport services and burn practices that only slightly increase operating costs, but significantly reduce local social and environmental impacts. Local, accurate, and complete waste stream data could help support future management planning for the solid waste management systems of these rural villages.Chapter 1. Introduction -- 1.1. Introduction to Integrated Solid Waste Management Systems -- 1.2. Solid Waste Management in Alaska -- 1.3. Rural Alaska Village Economics -- 1.4. Rural Alaska Landfills -- 1.5. Thesis Problem and Statement -- 1.6. Thesis Outline -- Chapter 2. Case Study -- 2.1. Kalskag and Fort Yukon Solid Waste Characterization -- 2.2. The Rural Villages of Kalskag and Fort Yukon -- 2.3. Waste Stream Characterization Methods -- 2.4. Waste Stream Characterization Results -- Chapter 3. Evaluation of Rural Alaska Waste Management Systems -- 3.1. Systems Modelling Approach and Life-Cycle Assessment -- 3.2. The EASETECH Model -- 3.3. Impact Categories -- 3.4. Materials and Methods -- 3.5. Results -- Chapter 4. Discussion -- References -- Appendices

Observation of large-scale multi-agent based simulations

The computational cost of large-scale multi-agent based simulations (MABS) can be extremely important, especially if simulations have to be monitored for validation purposes. In this paper, two methods, based on self-observation and statistical survey theory, are introduced in order to optimize the computation of observations in MABS. An empirical comparison of the computational cost of these methods is performed on a toy problem

Charge order and phase segregation in overdoped bilayer manganites

There have been recent reports of charge ordering around $x=0.5$ in the bilayer manganites. At $x=0.5$, there appears to be a coexistence region of layered A-type antiferromagnetc and charge order. There are also reports of orbital order in this region without any Jahn-Teller effect. Based on physical grounds, this region is investigated from a model that incorporates the two $e_g$ orbitals at each Mn site and a near-neighbour Coulomb repulsion. It is shown that there indeed is both charge and orbital order close to the half-doped region coincident with a layered magnetic structure. Although the orbital order is known to drive the magnetic order, the layered magnetic structure is also favoured in this system by the lack of coherent transport across the planes and the reduced dimensionality of the lattice. The anisotropic hopping across the $e_g$ orbitals and the underlying layered structure largely determine the orbital arrangements in this region, while the charge order is primarily due to the long range interactions.Comment: 6 pages, 6 figure