Ring signatures, introduced by Rivest, Shamir and Tauman (ASIACRYPT 2001), allow to sign a message on behalf of a set of users (called a ring) while guaranteeing authenticity, i.e. only members of the ring can produce valid signatures, and anonymity, i.e. signatures hide the actual signer. In terms of efficiency, the shortest ring signatures are of size Θ(logn), where n is the size of the ring,...

DISSERTATION zur Erlangung des akademischen Grades doctor rerum naturalium Dedicated to the memory of KARIN GATERMANN Table 1: List of mathematical symbols C field of complex numbers R field of real numbers Z ring of integer numbers C[x] ring of polynomials with coefficients in the field of complex numbers I ideal I def, tor deformed toric ideal V (I) variety of an ideal V (I def, tor) variety ...

To cite: Nattusamy L, Madan K, Bhalla AS, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2013-202981 DESCRIPTION A 35-year-old male patient presented with history of fever and cough of 2 months duration. The patient had lost appetite and 8 kg weight over 2 months. On examination of the respiratory system, scattered crackles were audible bilaterally. Rest ...

In the title compound, C25H19ClN2O5S, the phenyl ring forms dihedral angles of 79.62 (12) and 80.02 (13)° with the indole ring system and the benzene ring, respectively. The nitro group is twisted at an angle of 22.39 (11)° with respect to the attached benzene ring. In the crystal, mol-ecules assemble into double layers in the ab plane via C-H⋯O inter-actions.

The title compound, C(23)H(19)FN(2)O(3)S, a fused-pyrimidine derivative, displays dihedral angles between the thia-zole ring and the benzene ring and substituted benzene ring of 7.10 (14) and 3.48 (12)°, respectively. The dihydro-pyrimidine ring adopts a flattened boat conformation. The olefinic double bond is in a Z configuration.

in the present work, dft calculations are employed to obtain the optimized structures of 4-acyl pyrazolone tautomers (19 tautomers) using b3lyp/6-311++g** calculations. inaddition, molecular parameters, ir frequencies and relative energies are extracted for alltautomers. the existence of aromatic ring, keto tautomer (versus enol tautomer), n-h bond(versus c-h bond) and c=n double bond (versus n...

Abstract Ring signatures enable a user to sign messages on behalf of an arbitrary set users, called the ring, without revealing exactly which member that ring actually generated signature. The signer-anonymity property makes have been active research topic. Recently, Park and Sealfon (PS; CRYPTO’19) presented important anonymity notion named signer-unclaimability constructed lattice-based signa...

We wanted to congratulate Ng et al.1 for describing an effective lenticular hydration technique for identification and extraction of a lenticular remnant after small incision lenticule extraction (SMILE). We also agree with their observation that prevention is the best solution for this condition and we would like to add here two techniques described by one of us (SJ) to facilitate easy extract...

The "reversed halo" sign (RHS) is a distinct radiological sign representing a focal rounded area of ground-glass opacity surrounded by a more or less complete ring of consolidation. Initially, it was reported in two cases of cryptogenic organizing pneumonia and was considered to be relatively specific of the disease. Since then, it has been reported in a wide variety of clinical entities, thus ...

This is the first reported case of a patient who developed fungal pneumonia caused by Cunninghamella bertholletiae (= C. elegans) following cord blood transplantation and who showed a reversed halo sign on a chest computed tomography scan (CT). In addition, the pathological findings related to the reversed halo sign are described in detail for the first time. The patient died due to respiratory...