The Triple Procedure :Analysis of Structural, Functional & Refractive Outcome

PURPOSE:To analyse the outcome of Triple procedure(Combined penetrating keratoplasty, cataract extraction and intraocular lens implantation)  is a surgical technique for visually disabling corneal conditions with associated cataract .METHODS:The medical records  of 120 patients who underwent triple procedure between January 2007 and December 2011 in terms of  demographic data,past ophthalmic history, indications for surgery  were retrospectively reviewed.Salient preoperative data included the initial visual acuity at the time of presentation , slit lamp findings of cornea(scar, haze, vascularisation , stromal folds with bullae ), anterior chamber , lens details , intraocular pressure status ,posterior segment examination with the help of indirect ophthalmoscope or B scan ultrasongraphy.RESULTS:A total of 120 corneal triple procedures performed were included in this study . Of 120 patients , 25 (20.83%)were male and  95 (79.17%)  were female.Mean age of these patients was 42.45 +/-15.85   years(range  9 to 75 years ) . The mean postoperative  follow up was 15.08+/-12.8 months(range ,1.5 to 49 months ).Failed therapeutic grafts(42.5%)-was the  common indication found for surgery .Preoperatively , intraocular pressure was increased in 11(9.16%) patients . Conventional triple procedure in terms of combined penetrating keratoplasty with extracapsular cataract extraction with intraocular lens implantation(PK+ECCE+IOL) was performed in 114 ( 95%) eyes , 01(0.83%)  eye underwent keratoplasty with phacoemulsification with intraocular lens implantation(PK+PE+IOL), and secondary intraocular lens implantation (PK+IOL)in 05 (4.17%)eyes .CONCLUSION:Triple procedure is  an effective surgical option in corneal diseases associated with cataract.It provides an optimal visual and refractive  outcome  especially in high risk grafts situation

Non Binary Low Density Parity Check Codes Decoding Over Galois Field

Conventional LDPC codes have a low decoding complexity but may have high encoding complexity. The encoding complexity is typically of the order O(n2)[5]. Also high storage space may be required to explicitly store the generator matrix. For long blocknbsp lengths the storage space required would be huge. The above factors make the implementation of the Conventional LDPC codes less attractive. These codes are usually decoded using the sum-product algorithm, which is anbsp message passing algorithm working on the Tanner graph of the code[5]. The sparseness of the parity check matrix is essential for attaining good performance with sum-product decoding. The time complexity of the sum- product algorithm is linear in code length. This property makes it possible to implement a practical decoder for long lengths.nbs

IoT-Based Multi-Dimensional Chaos Mapping System for Secure and Fast Transmission of Visual Data in Smart Cities

A “smart city” sends data from many sensors to a cloud server for local authorities and the public to connect. Smart city residents communicate mostly through images and videos. Many image security algorithms have been proposed to improve locals’ lives, but a high-class redundancy method with a small space requirement is still needed to acquire and protect this sensitive data. This paper proposes an IoT-based multi-dimensional chaos mapping system for secure and fast transmission of visual data in smart cities, which uses the five dimensional Gauss Sine Logistic system to generate hyper-chaotic sequences to encrypt images. The proposed method also uses pixel position permutation and Singular Value Decomposition with Discrete fractional cosine transform to compress and protect the sensitive image data. To increase security, we use a chaotic system to construct the chaotic sequences and a diffusion matrix. Furthermore, numerical simulation results and theoretical evaluations validate the suggested scheme’s security and efficacy after compression encryption.publishedVersio

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum