Electrical Access to Ising Anyons in Kitaev Spin Liquids.

We show that spin-spin correlations in a non-Abelian Kitaev spin liquid are associated with a characteristic inhomogeneous charge density distribution in the vicinity of Z_{2} vortices. This density profile and the corresponding local electric fields are observable, e.g., by means of surface probe techniques. Conversely, by applying bias voltages to several probe tips, one can stabilize Ising anyons (Z_{2} vortices harboring a Majorana zero mode) at designated positions, where we predict a clear Majorana signature in energy absorption spectroscopy.

Spin Chain Network Construction of Chiral Spin Liquids.

We show that a honeycomb lattice of Heisenberg spin-1/2 chains with three-spin junction interactions allows for controlled analytical studies of chiral spin liquids (CSLs). Tuning these interactions to a chiral fixed point, we find a Kalmeyer-Laughlin CSL phase which here is connected to the critical point of a boundary conformal field theory. Our construction directly yields a quantized spin Hall conductance and localized spinons with semionic statistics as elementary excitations. We also outline the phase diagram away from the chiral point where spinons may condense. Generalizations of our approach can provide microscopic realizations for many other CSLs.

Exact edge singularities and dynamical correlations in spin-1/2 chains.

Exact formulas for the singularities of the dynamical structure factor, Szz(q,omega), of the S=1/2 xxz spin chain at all q and any anisotropy and magnetic field in the critical regime are derived, expressing the exponents in terms of the phase shifts which are known exactly from the Bethe ansatz solution. We also study the long-time asymptotics of the self-correlation function 0|Sjz(t)Sjz(0)|0. Utilizing these results to supplement very accurate time-dependent density matrix renormalization group, for short to moderate times, we calculate Szz(q,omega) to very high precision.

The contribution of otoneurological evaluation to tinnitus diagnosis.

Tinnitus has been reported for nearly 80% of patients referred to the otolaryngology services. Usually, its evaluation is based on tonal and vocal audiometry, tympanometry, brainstem-evoked potentials, electrocochleography, and otoacoustic emissions. However, as the cochleovestibular system works as a unit, the use of vestibular tests has been proposed to evaluate tinnitus. Many patients with tinnitus have altered vestibular test results even in the absence of vestibular symptoms. This finding accounts for the indication of complete vestibular and audiological evaluation of tinnitus. The aim of this study is to analyze the contribution of otoneurological evaluation in the diagnosis of tinnitus. Patients were selected and divided into two groups. Group 1 was composed of patients complaining about tinnitus only, whereas group 2 was composed of patients with tinnitus associated with dizziness, hearing loss, and fullness. All submitted to otoneurological evaluation based on directed clinical history, physical examination, tonal and vocal audiometry, tympanometry, and vestibular examination. A total of 195 patients were analyzed. The otoneurological evaluation was conclusive in the diagnosis in 48 cases (75%) in group 1 and in 94 cases (72%) in group 2. The present study showed that otoneurological evaluation contributes to the etiological diagnosis of tinnitus.

Abscesso submandibular: bacteriologia e tratamento: revisäo de três anos / Submandibular space infection: bacteriology and treatment: three years review

O abscesso submandibular é patologia corrente na prática médica do otorrinolaringologista. Näo obstante, a conduta frente para estes pacientes ainda é motivo de discussäo. Baseado nesse fato, o serviço de Otorrinolaringologia do Hospital de Clínicas da Universidade Federal do Paraná realizou revisäo dos casos de abscessos submandibulares ocorridos entre janeiro de 1993 e dezembro de 1995, com os pacientes estudados quanto ao sexo, idade, tempo de evoluçäo, forma de tratamento clínico e/ou cirúrgico e cultura das secreçöes. O resultado mais significativo foi a ocorrência discreta de bactérias gram negativas nas culturas das secreçöes, concluindo-se portanto que o uso de aminoglicosídeos deve ser evitado no tratamento inicial do paciente, pois sua utilizaçäo pode ser iniciada quando ocorrer resultado bacteriológico positivo para bactérias gram negativas

Dente ectópico em seio etmóide: caso clínico / Ectopic tooth in ethmoid sinus: a clinical case

Dentes ectópicos foram descritos em uma grande variedade de locais, sendo sua ocorrência em seios paranasais extremamente rara. Relatamos um caso no qual uma paciente com quadro clínico de sinuosi crônica foi submetida a tomografia computadorizada de seios da face que revelou a existência de uma pansinusite e uma estrutura de densidade óssea em regiäo de células etmoidais posteriores a esquerda. Esta paciente foi submetida a cirurgia tendo sido detectada durante o ato cirúrgico, uma estrutura de consistência óssea de aspecto morfológico semelhante a um dente. A descriçäo anatomopatológica da massa encontrada foi de dente ectópico de estrutura habitual. O diagnóstico clínico radiológico é muitas vezes inconclusivo, porém é importante, devido ao aumento de morbidade associada com tal patologia