Automatic ontology mapping for agent communication

Agent communication languages such as ACL and KQML provide a standard for agent communication. These languages enable an agent to specify the intention and the content of a message as well as the protocol, the language, and the ontology that are used. For the protocol and the language some standards are available and should be known by the communicating agents. The ontology used in a communication depends on the subject of the communication. Since the number of subjects is almost infinite and since the concepts used for a subject can be described by different ontologies, the development of generally accepted standards will take a long time. This lack of standardization, which hampers communication and collaboration between agents, is known as the interoperability problem. To overcome the interoperability problem, agents must be able to establish a mapping between their ontologies. This paper investigates a new approach to the interoperability problem. The proposed approach requires neither a correspondence between concepts used in the ontologies nor a correspondence between the structure of the ontologies. It only requires that some instances of the subject about which the agents try to communicate are known by both agents.economics of technology ;

The lambda-dimension of commutative arithmetic rings

It is shown that every commutative arithmetic ring $R$ has $lambda$-dimension $leq 3$. An example of a commutative Kaplansky ring with $lambda$-dimension 3 is given. If $R$ satisfies an additional condition then $lambda$-dim($R$

Preparation Methods for Quantitative Electron Probe X-Ray Microanalysis of Rat Exocrine Pancreas: A Review

Pancreatic acinar cells are thought to secrete a fluid containing digestive enzymes and electrolytes and use e,g, calcium as a second messenger upon stimulation, Together with their pronounced morphological polarity, they provide a model system to study the effect of different preparation methods for quantitative biological electron probe X-ray microanalysis (EPXMA) of ultrathin sections, Several preparation methods i,e,, freeze-drying and plastic-embedding, freeze-substitution (2 days) and freeze-drying of ultrathin cryosections have been applied to examine the retention of sodium, magnesium, phosphorus, sulfur, (chlorine), potassium and calcium in subcellular compartments (basal cytoplasm, apical cytoplasm, mitochondria and zymogen granules), In freeze-substituted samples the phosphorus, potassium and sulfur concentrations were 2-3 times lower in all compartments compared to freeze-dried, plastic-embedded samples, Intracellular potassium-to-sodium ratios obtained on frozen substituted and frozen-dried, plastic-embedded samples were considerably lower than for cryosections, Element gradients between adjacent organelles were large in frozen-dried cryosections, smaller in frozen-dried plastic-embedded samples and insignificant in frozen-substituted samples

A supermassive binary black hole with triple disks

Hierarchical structure formation inevitably leads to the formation of supermassive binary black holes (BBHs) with a sub-parsec separation in galactic nuclei. However, to date there has been no unambiguous detection of such systems. In an effort to search for potential observational signatures of supermassive BBHs, we performed high-resolution smoothed particle hydrodynamics (SPH) simulations of two black holes in a binary of moderate eccentricity surrounded by a circumbinary disk. Building on our previous work, which has shown that gas can periodically transfer from the circumbinary disk to the black holes when the binary is on an eccentric orbit, the current set of simulations focuses on the formation of the individual accretion disks, their evolution and mutual interaction, and the predicted radiative signature. The variation in mass transfer with orbital phase from the circumbinary disk induces periodic variations in the light curve of the two accretion disks at ultraviolet wavelengths, but not in the optical or near-infrared. Searches for this signal offer a promising method to detect supermassive BBHs.Comment: Accepted for publication in the Astrophysical Journal, 16 pages, 11 figures. High Resolution Version is Available at http://www2.yukawa.kyoto-u.ac.jp/~kimitake/bbhs.htm

Soft breaking of Lμ−LτL_\mu-L_\tau symmetry: Light neutrino spectrum and Leptogenesis

Continuous $U(1)_{L_\mu-L_\tau}$ symmetry can generate quasi degenerate mass spectrum for both left handed light and right handed heavy Majorana neutrinos assuming that the symmetry preserving non zero parameters are nearly same. There is an accidental $\mu\tau$ exchange symmetry in the light and heavy neutrino Majorana mass terms. This implies $\theta_{13}=0$ and $\theta_{23}=\frac{\pi}{4}$. In addition it generates another zero mixing angle and one zero mass difference. We restrict ourselves to type-I See-Saw mechanism for generation of light neutrino mass. We have found that under $U(1)_{L_\mu-L_\tau}$ symmetry cosmological lepton asymmetry vanishes. We break $U(1)_{L_\mu-L_\tau}$ such a way that the $\mu\tau$ exchange symmetry preserves in the neutrino sector. We have seen that light neutrino phenomenology can be explained under soft breaking of this symmetry. We have observed that softness of this symmetry breaking depends on the degeneracy of the light neutrino mass spectrum. Quasi-degeneracy of right handed neutrino mass spectrum opens an option for resonant leptogenesis. The degeneracy of the right handed neutrino mass spectrum is restricted through light neutrino data. We observed that for generation of right sized baryon asymmetry common neutrino mass scale $m_0$ have to be of the order of $\sqrt{\Delta m^2_{\rm atm}}$ and corresponding right handed neutrino mass scale have to be nearly $10^{13}$ GeV. We also have discussed the effect of RG evolution on light neutrino spectrum and also on baryon asymmetry.Comment: 21 pages, no figure, Revised with the comments on RG effec

Profile of mortality of patients admitted to Weskoppies Psychiatric Hospital in South Africa over a 5-year period (2001-2005)

Objective: Mortality in the psychiatric population, both from natural and unnatural causes, is higher than in the general population and this is despite an improvement in the delivery of care and treatment of mental illness in recent years. The study was conducted to determine a profile of mortality and standardized mortality rates within our psychiatric hospital. Method: A retrospective clinical case audit was conducted of deaths that occurred at Weskoppies Hospital between 1st January 2001 and 31st December 2005. Direct standardised mortality rates were calculated (gender specific adjusted for age according to the South African population). Results: A total of 164 deaths were observed during this period. The gender-specific all cause mortality rates, standardised to the South African population, were 0.0177 (95% CI 0.0141, 0.0213) and 0.0163 (95% CI 0.0121, 0.0206) for males and females respectively. The all cause mortality rates for the South African male and female population were 0.0188 and 0.0170 respectively (not significantly different as it falls within the 95% confidence interval of the standardised rates). The predominant natural cause of mortality was infection. Ten of the deaths were due to unnatural causes, of these 7 were suicides. The mortality ratio for unnatural causes was 0.47. Conclusion: Mortality studies are important tools for determining quality of health care provisions to patients. Studies of this nature assist in making recommendations for optimal clinical practice and aid in developing preventative measures.Key words: Psychiatric; In-patient; Mortality; Mortality rati

Opportunities for sustainable economic development of the coastal territories of the Baltic Sea Region in the context of digital transformation

The article explores opportunities for the sustainable economic development of coastal territories in the Baltic Sea region (BSR) arising in blue economy sectors in the framework of digital transformation. The study argues that a more active commercialisation of territorial resources can facilitate the sustainable economic development of the BSR coastal territories, following digitally-driven innovations. The paper provides an overview of methodological approaches to territorial sustainability. It also assesses the 2009-2018 level of the socio-economic development of the BSR coastal territories, underpins the importance of the blue economy and highlights the role of digital transformation in reaching the UN Sustainable Development Goals (SDGs) in the BSR through digitally-driven innovations. A comparative and problem-targeted statistics analyses show significant differences in the level and dynamics of socio-economic development in the BSR coastal territories with their GRP per capita being generally lower than the national or macroregional average. A review of literature on sustainable development in the BSR has shown that a more active use of unique resources of the coastal territories along with a technology-driven growth of blue economy sectors can counterbalance the negative impact of the territories’ uneven development on the progress towards the SDGs in the BSR. Increasing the competitiveness of the BSR coastal territories requires investment in digital solutions in the blue economy sectors and the creation of a communication infrastructure. The review of key innovations in the blue economy sectors shows that their implementation gives impetus to other industries by reducing costs, creating new jobs, and improving the quality of products and services