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In recent years, there has been a notable amount of research on developing cryptographic schemes that are secure against both quantum and classical computers. In 2016, the National Institute of Standards and Technology (NIST) initiated a process to solicit, evaluate, and standardize one or more quantum-resistant public key cryptographic schemes. This process originated because quantum computers can exploit quantum mechanical phenomena and solve mathematical problems that are difficult or intractable for classical computers. This kind of mathematical problem is the basis of secure public key cryptography. As a consequence, in a near future quantum computers will be able to break many of the public key schemes currently in use. However, the challenge is especially acute for devices with different architectures. They might not be well equipped to run the new standards and interoperate with existing communication protocols and networks. In this work, we analyze the performance of postquantum schemes in the transport layer security (TLS) protocol considering x86 as the server architecture and x86/ARM architectures as clients. All of them lack cloud computing or virtualized environments. Our analysis considers integrating the implementation of two cryptographic schemes that were successful in the second round of the postquantum standardization process, namely, Dilithium and New Hope. The performance of postquantum schemes in the TLS protocol is statistically analyzed in x86 and ARM architectures, giving the relationships, the effects and the survival of the analysis.

This paper analyzes a cohort of children diagnosed with congenital strabismus independent of the deviation direction, dissociated and non-dissociated, to identify anisocoria magnitude under scotopic conditions. This disease presents changes in the white matter affecting the nerve conduction in the cortical integrator, exacerbating the reflexes controlling pupil size, producing subtle changes in the pupil dimensions that are difficult to measure using current methods. The proposed indexes estimate the degree of anisocoria using the Feret diameter and the Pattern Pupil parameter. This research presents a prospective, transversal, and experimental study carried out on 168-Mexican children aged 5-15 years from Querétaro, México, diagnosed with dissociated and non-dissociated congenital strabismus. The utilized images come from videos of each patient recorded in scotopic lighting conditions (0.3 lux). The ophthalmologist measured the Feret diameters of both pupils using the ImageJ software. 11.9% of the sample group showed “Very significant,” and “Significant” degrees of anisocoria, whereas 88.1% of the sample group had “Non-significant,” and “Few significant” degrees of anisocoria. When comparing the results with those obtained using the perimeter, and the diameter, subtle variations of anisocoria were better detected using the area criterion. ANOVA experiments allowed the following: 1) dissociated and non-dissociated congenital strabismus identification using nidp index, and 2) the comparison of the anisocoria degrees identified by the nidp and Ddmm ≥0.4 mm indexes.

In data handling, security and privacy are essential for database administrators and users that own their information. Information about security models or architectures was analyzed for databases that minimize Cyber Attacks. The problem is that security models deployed in databases in public organizations suffer from computer attacks due to vulnerabilities in their security management systems. Data providers often publish the information for research purposes, publishing compromises on the privacy of the data of users registered in the entities. There are many security techniques for databases based on data encryption processes in transactions, however, the techniques found compromise information. The development of the document used the deductive method and exploratory research technique that allows us to study the information in the articles presented. In this document we have proposed a Security Model Assessment Prototype for Databases, a Prototype of Security Management Architecture in Blockchain for a Database, a Database Security Algorithm, a Logical Structure of the Management System in Blockchain, and a Prototype to mitigate cyberattacks. The use of a hybrid blockchain model provides the system with the optimal security that public organizations in relation to test results performed with a 99.50% security effectiveness. The simulations presented in this document were conducted based on in-depth studies and the data were randomly placed with a range according to the study results based on real-world situations.

Renewable generation has gained relevance worldwide in the production of electricity. Mechanisms such as feed-in tariffs have made investment viable in this type of technology. However, in the medium term these technologies will be competitive, and these promotion mechanisms will gradually be phase out. On the other hand, reducing the intermittency of these plants requires economic incentives. This paper proposes a complementary economic incentive for Renewable Energy Resources (RER) production, aimed at increasing their production in the electricity market taking into account their probability of meeting the dispatched energy requirements. This methodology was tested for solar and wind plants that actually operate in the electric power system of Peru, considering three different demand scenarios. The proposed economic incentive constitutes an alternative to promote the investments to increase the reliability in the production of renewable energy sources especially, for the technologies who have reached competitive market conditions.

This document contemplated the implementation of an autonomous robotic fish multilink of two degrees of freedom, by caudal fin propulsion that, according to propulsive mechanisms employed by fish, propels itself using lateral oscillations. A performance comparison was made between the fish of 2 links and one of 4 links in caudal fin, whose stability and maneuverability were evaluated based on the Schiehlen method for multibody systems. The structurally proposed fish is composed as an open system of two links with a rigid head, flexible rear body and the mobile caudal fin. Finally, the experiments and results regarding the swimming obtained are exposed by observing the oscillatory movement and the functionality of its caudal fin to meet the displacement on linear trajectories.

On-chip integrated photonics has been dominated by silicon devices for nearly two decades. Due to high optical absorption in the visible as well as carrier losses, pursuing applications in UV and visible wavelength ranges as well as mid-IR have been challenges. However, with the recent emergence of 2D materials (eg graphene and MoS 2 ) as well as highly nonlinear, CMOS fabrication compatible materials (eg lithium niobate and silicon carbide), the potential application set has broadened considerably [1] , [2] . These materials also pave the way for broadband and wide-spanning frequency converters, a key component to realizing an optical quantum computer.

Non-concentrating tandem solar are on the verge of entering the PV market. One particular challenge for tandem solar cells is the interconnection scheme of the sub-cells in a module, and the implications on techno-economic factors. Here, we theoretically compare four possible tandem module architectures using the material combinations GaAs and perovskite on silicon to their single-junction counterparts. We model energy yield and performance ratios for operating conditions around the globe, and we explore the differences in cost structures. In general, we find the techno-economic performance of three-terminal and mechanically voltage-matched modules to be the most promising. Tandems are especially well suited for high-value markets and arid climates. In such conditions, the manufacturing cost premium for a record-level tandem is up to three times that of a silicon PV module.

Todays commercial and utility photovoltaic (PV) installations predominantly use monofacial PV-modules in a mounting structure with a fixed-tilt. In recent years, front and rear efficiencies of bifacial PV modules have improved and their cost has dropped, as has the cost for single-axis and dual-axis trackers. These advances make those two technologies interesting options to improve the yield of PV installations. In this work, we present a comparison of the calculated techno-economic performance of conventional installations and different combinations of bifacial and tracking configurations. We find that installations with bifacial modules and one-axis trackers provide the greatest techno-economic benefit over monofacial fixed-tilt installation by increasing yield by, on average 35%, and reducing LCOE on the vast majority of locations in the world by more than 10%. Dual axis trackers achieve even higher yields, yet the high cost for these trackers results in an overall higher LCOE. Sensitivity analyses reveal that our conclusions are robust in general, but the best configuration in a given location still requires analyzing local conditions in detail.