A Renormalization Group Analysis of the NCG constraints m_{top} = 2\,m_W}, mHiggs=3.14 mWm_{Higgs} = 3.14 \, m_W

We study the evolution under the renormalization group of the restrictions on the parameters of the standard model coming from Non-Commutative Geometry, namely $m_{top} = 2\,m_W$ and $m_{Higgs} = 3.14 \, m_W$. We adopt the point of view that these relations are to be interpreted as {\it tree level} constraints and, as such, can be implemented in a mass independent renormalization scheme only at a given energy scale $\mu_0$. We show that the physical predictions on the top and Higgs masses depend weakly on $\mu_0$.Comment: 7 pages, FTUAM-94/2, uses harvma

Bath Assisted Cooling of Spins

A suitable sequence of sharp pulses applied to a spin coupled to a bosonic bath can cool its state, i.e., increase its polarization or ground state occupation probability. Starting from an unpolarized state of the spin in equilibrium with the bath, one can reach very low temperatures or sizeable polarizations within a time shorter than the decoherence time. Both the bath and external fields are necessary for the effect which comes from the backreaction of the spin on the bath. This method can be applied to cool at once a disordered ensemble of spins. Since the bath is crucial for this mechanism, the cooling limits are set by the strength of its interaction with the spin(s).Comment: 4 pages. Accepted in PR

Aventurescence

Aventurescence explores ideas of comfort and identity through glass and the body. I am interested in the material qualities and limitations of glass, including luminosity, flexibility, and fragility; and the ways in which these can be expressed and communicated through the body. To expand the material’s flexibility I used a combination of multiple glass bodies and silicones to create glass textiles and objects with flexible surfaces. I also used traditional fusing methods and alternative glasses (reflective glass beads) to create sheets and screens. These objects and textiles parallel skin, and communicate with the body through object, performance, and the consequent documentation of performance. The culmination of my research was a cohesive body of work, utilizing the body, silicones, and glass, to create objects, performance, and installation

PENGATURAN HUKUM INTERNASIONAL TENTANG PERLINDUNGAN PEJABAT DIPLOMATIK DI NEGARA PENERIMA

Tujuan dilakukannya penelitian ini yaitu untuk mengetahui bagaimana Pengaturan hukum internasional tentang Perlindungan Pejabat Diplomatik di Negara Penerima dan bagaimana Pertanggungjawaban Negara terhadap Pejabat Diplomatik yang mendapat ancaman di Negara Penerima di mana dengabn metode penelitian hukum normatif disimpulkan: 1. Pelanggaran terhadap pejabat diplomatik sangat marak terjadi, baik itu ancaman maupun terorisme. Padahal, para pejabat diplomatik mempunyai tugas yang sangat berat dalam hal menjalin hubungan dan menjadi perwakilan bagi negaranya di negara penerima. Untuk itu diperlukan sebuah instrumen hukum sebagai bentuk perlindungan terhadap para perwakilan diplomatik di negara penerima. Dalam hukum internasional pun telah mengatur adanya aturan-aturan berupa konvensi tentang perlindungan terhadap perwakilan diplomatik maupun konsuler. Konvensi-konvensi tersebut yaitu, Konvensi Wina 1961 tentang Hubungan Diplomatik dan Konvensi Wina 1963 tentang Hubungan Konsuler. Dalam konvensi-konvensi tersebut telah berisi tentang bagaimana hak kekebalan dan keistimewaan dari perwakilan diplomatik dan konsuler itu sendiri. 2. Sebagai negara penerima memiliki kewajiban untuk menjamin adanya keselamatan dan serta melindungi para perwakilan diplomatik di negaranya, sesuai dengan yang telah tercantum dalam Konvensi Wina Pasal 29. Namun jika terjadi pelanggaran atau ancaman terhadap perwakilan diplomatik di negara penerima, sebagai Negara penerima harusnya bertanggungjawab penuh atas pelanggaran yang terjadi terhadap para pejabat diplomatik di negaranya. Dan bentuk tanggung jawab terhadap pelanggaran yang terjadi dapat dilihat sesuai dengan Draft ILC 2001 yaitu, Reparation (perbaikan), Compensation (kompensasi), Restitution (restitusi) dan Satisfaction (pemuasaan).Kata kunci: pejabat diplomati

Medio siglo de antropología filosófica en la América Latina

Fil: Gracia, Jorge J. E.

QED in external fields from the spin representation

Systematic use of the infinite-dimensional spin representation simplifies and rigorizes several questions in Quantum Field Theory. This representation permutes ``Gaussian'' elements in the fermion Fock space, and is necessarily projective: we compute its cocycle at the group level, and obtain Schwinger terms and anomalies from infinitesimal versions of this cocycle. Quantization, in this framework, depends on the choice of the ``right'' complex structure on the space of solutions of the Dirac equation. We show how the spin representation allows one to compute exactly the S-matrix for fermions in an external field; the cocycle yields a causality condition needed to determine the phase.Comment: 32 pages, Plain TeX, UCR-FM-01-9

Web-Based Measure of Semantic Relatedness

Semantic relatedness measures quantify the degree in which some words or concepts are related, considering not only similarity but any possible semantic relationship among them. Relatedness computation is of great interest in different areas, such as Natural Language Processing, Information Retrieval, or the Semantic Web. Different methods have been proposed in the past; however, current relatedness measures lack some desirable properties for a new generation of Semantic Web applications: maximum coverage, domain independence, and universality. In this paper, we explore the use of a semantic relatedness measure between words, that uses the Web as knowledge source. This measure exploits the information about frequencies of use provided by existing search engines. Furthermore, taking this measure as basis, we define a new semantic relatedness measure among ontology terms. The proposed measure fulfils the above mentioned desirable properties to be used on the Semantic Web. We have tested extensively this semantic measure to show that it correlates well with human judgment, and helps solving some particular tasks, as word sense disambiguation or ontology matching

Metallic Coaxial Nanolasers

The last two decades have witnessed tremendous advancements in the area of nanophotonics and plasmonics. Undoubtedly, the introduction of metallic structures has opened a path towards light confinement and manipulation at the subwavelength scale { a regime that was previously thought to be out of reach in optics. Of central importance is to devise efficient light sources to power up the future nanoscale optical circuits. Coaxial resonators can provide a platform to implement such subwavelength sources. They support ultrasmall cavity modes and offer large mode-emitter overlap as well as multifold scalability. Given their large modulation bandwidth, they hold promise for high speed optical interconnects { where they can be used for light generation and modulation simultaneously. In addition, the possibility of thresholdless operation in such devices may have implications in developing the next generation of efficient lighting systems. In this review article, the physics and applications of coaxial nanolasers will be discussed

Numerical approximations to a singularly perturbed convection-diffusion problem with a discontinuous initial condition

A singularly perturbed parabolic problem of convection-diffusion type with a discontinuous initial condition is examined. An analytic function is identified which matches the discontinuity in the initial condition and also satisfies the homogenous parabolic differential equation associated with the problem. The difference between this analytical function and the solution of the parabolic problem is approximated numerically, using an upwind finite difference operator combined with an appropriate layer-adapted mesh. The numerical method is shown to be parameter-uniform. Numerical results are presented to illustrate the theoretical error bounds established in the paper. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature