Securing data transfer in the cloud through introducing identification packet and UDT-authentication option field: a characterization

The emergence of various technologies has since pushed researchers to develop new protocols that support high density data transmissions in Wide Area Networks. Many of these protocols are TCP protocol variants, which have demonstrated better performance in simulation and several limited network experiments but have limited practical applications because of implementation and installation difficulties. On the other hand, users who need to transfer bulk data (e.g., in grid/cloud computing) usually turn to application level solutions where these variants do not fair well. Among protocols considered in the application level solutions are UDP-based protocols, such as UDT (UDP-based Data Transport Protocol) for cloud /grid computing. Despite the promising development of protocols like UDT, what remains to be a major challenge that current and future network designers face is to achieve survivability and security of data and networks. Our previous research surveyed various security methodologies which led to the development of a framework for UDT. In this paper we present lowerlevel security by introducing an Identity Packet (IP) and Authentication Option (AO) for UDT.Comment: 17 page

Interrater reliability in visual identification of interictal high-frequency oscillations on electrocorticography and scalp EEG.

High-frequency oscillations (HFOs), including ripples (Rs) and fast ripples (FRs), are promising biomarkers of epileptogenesis, but their clinical utility is limited by the lack of a standardized approach to identification. We set out to determine whether electroencephalographers experienced in HFO analysis can reliably identify and quantify interictal HFOs. Two blinded raters independently reviewed 10 intraoperative electrocorticography (ECoG) samples from epilepsy surgery cases, and 10 scalp EEG samples from epilepsy monitoring unit evaluations. HFOs were visually marked using bandpass filters (R, 80-250 Hz; FR, 250-500 Hz) with a sampling frequency of 2,000 Hz. There was agreement as to the presence or absence of epileptiform discharges (EDs), Rs, and FRs, in 17, 18, and 18 cases, respectively. Interrater reliability (IRR) was favorable with κ = 0.70, 0.80, and 0.80, respectively, and similar for ECoG and scalp electroencephalography (EEG). Furthermore, interclass correlation for rates of Rs (0.99, 95% confidence interval [CI] 0.96-0.99) and FRs (0.77, 95% CI 0.41-0.91) were superior in comparison to EDs (0.37, 95% CI -0.60 to 0.75). Our data suggest that HFO identification and quantification are reliable among experienced electroencephalographers. Our findings support the reliability of utilizing HFO data in both research and clinical arenas

Immunization against complete subversion without random oracles

We seek constructions of general-purpose immunizers that take arbitrary cryptographic primitives, and transform them into ones that withstand a powerful “malicious but proud” adversary, who attempts to break security by possibly subverting the implementation of all algorithms (including the immunizer itself!), while trying not to be detected. This question is motivated by the recent evidence of cryptographic schemes being intentionally weakened, or designed together with hidden backdoors, e.g., with the scope of mass surveillance. Our main result is a subversion-secure immunizer in the plain model, that works for a fairly large class of deterministic primitives, i.e. cryptoschemes where a secret (but tamperable) random source is used to generate the keys and the public parameters, whereas all other algorithms are deterministic. The immunizer relies on an additional independent source of public randomness, which is used to sample a public seed. Assuming the public source is untamperable, and that the subversion of the algorithms is chosen independently of the seed, we can instantiate our immunizer from any one-way function. In case the subversion is allowed to depend on the seed, and the public source is still untamperable, we obtain an instantiation from collision-resistant hash functions. In the more challenging scenario where the public source is also tamperable, we additionally need to assume that the initial cryptographic primitive has sub-exponential security. Previous work in the area only obtained subversion-secure immunization for very restricted classes of primitives, often in weaker models of subversion and using random oracles

Pluralism in economics : from epistemology to hermeneutics

The objective of this paper is to bring elements from the philosophical movement ofhermeneutics and pragmatism to the discussion on methodology in economics, with aspecific concern on the theory of truth. Our aim is to present the concept of thehermeneutic space, developed by the philosopher Richard Rorty, as a rational justificationfor pluralism in economics. We consider the hermeneutic space an interesting conceptwhich should allow us to overcome the void left by the incapacity of epistemologicaltheories to explain the evolution of sciences. It defends the idea that our culture, values andways of interpreting things are what build the sciences, not any closed epistemologicalmethod. In this sense, pluralism is nothing more than letting the hermeneutic space work,without epistemological barriers, and understanding that this is desirable for the futuredevelopment of economics as a science. This approach differs from all othermethodological justifications for pluralism because it does not rely on any epistemologicalmethod, but assumes that the hermeneutic space can entirely fulfill the gap created by them

Programa “iniciativa pedagógica orquestando” en el logro de aprendizajes de estudiantes de la institución educativa Isabel la Católica, 2023

La presente investigación tuvo como objetivo determinar la influencia del programa “Iniciativa Pedagógica Orquestando” en el logro de aprendizajes de estudiantes de la Institución Educativa Isabel la Católica del distrito de La Victoria, Lima. La metodología fue de enfoque cuantitativo, de tipo básico, de nivel explicativo y de diseño no experimental. La población fue de 48 escolares entre 12 y 14 años, mediante un muestreo no probabilístico. La técnica fue la encuesta, los instrumentos aplicados fueron el cuestionario y ficha de observación. La prueba de confiabilidad del Alfa de Cronbach fue (0,733) y (0,865) de ambas variables. Se realizo la validez del instrumento mediante el juicio de expertos. Para la contrastación de hipótesis se empleó los estadísticos Tau B de Kendall y la regresión ordinal. Los resultados obtenidos revelaron el valor de (sig) 0,050. Asimismo, el índice de Nagelkerke fue de 0,178, lo cual sugiere que la influencia del programa “Orquestando” en el logro de aprendizajes es del orden del 17,8%. En conclusión, el programa “Iniciativa pedagógica Orquestando” tiene una influencia poco significativa en el logro de aprendizajes de los estudiantes de la I.E. Isabel la Católica

Stable Bilateral Teleoperation Control Method for Biped Robots with Time-Varying Delays

This document proposes a control scheme applied to delayed bilateral teleoperation of the forward and turn speed of a biped robot against asymmetric and time-varying delays. This biped robot is modeled as a hybrid dynamic system because it behaves as a continuous system when the leg moves forward and discrete when the foot touches the ground generating an impulsive response. It is proposed to vary online the damping according to the time delay present in the communication channel, and the walking cycle time using an optimization criterion, to decrease the teleoperation system errors. To accomplish this, a three-phase cascade calibration process is used, and their benefits are evidenced in a comparative simulation study. The first phase is an offline calibration of the inverse dynamic compensation and also the parameters of the bilateral controller. The second phase guarantees the bilateral coordination of the delayed teleoperation system, using the Lyapunov–Krasovskii stability theory, by changing the leader damping and the equivalent follower damping together. The third phase assures a stable walk of the hybrid dynamics by controlling the walking cycle time and the real damping to move the eigenvalues of the Poincaré map, numerically computed, to stable limit cycles and link this result with an equivalent continuous system to join both phases. Additionally, a fictitious force was implemented to detect and avoid possible collisions with obstacles. Finally, an intercontinental teleoperation experiment of an NAO robot via the Internet including force and visual feedback is shown

Mepolizumab in Hypereosinophilic Syndrome: A Systematic Review and Meta-analysis

We aimed to evaluate the efficacy and safety of mepolizumab (MEP) in the management of hypereosinophilic syndrome (HES). A systematic search was performed, and articles published until March 2021 were analyzed. The primary efficacy results evaluated were hospitalization rate related to HES, morbidity (new or worsening), relapses/failure, treatment-related adverse effects, prednisone dosage ≤10 mg/day for ≥8 weeks, and eosinophil count <600/μL for ≥8 weeks. A meta-analysis was conducted, when appropriate. Three randomized controlled trials (RCTs), with a total of 255 patients, were included. The studies contemplated the use of MEP 300 mg/SC or 750 mg/IV. According to the evaluation of the proposed outcomes, when relapse rates/therapeutic failures were assessed, there was a 26% reduction with MEP 300 mg/SC (RD=-0.26; 95% CI: -0.44 to -0.08; p=0.04) and 48% reduction with MEP 750 mg/IV (RD=-0.48; 95% CI: -0.67, -0.30; p<0.00001). For the outcomes, prednisone dosage ≤10 mg/day for ≥8 weeks was 48% (RD=0.48; 95% CI: 0.35 to 0.62; p<0.00001), and the eosinophil count <600/μL for ≥8 weeks was 51% (RD=0.51; 95% CI: 0.38 to 0.63; p<0.00001), both showed a reduction with MEP 300 mg/IV and 750 mg/IV. No statistically significant differences in treatment-related adverse effects outcomes were observed for either dosage (RD=0.09; 95% CI: -0.05 to 0.24; p=0.20; RD=0.09; 95% CI: -0.11 to 0.29; p=0.39). Despite the positive effects observed for the studied outcomes, the exact significance remains unclear

Diseño de la red de estacionamientos para bicicletas en la Universidad Pedagógica y Tecnológica de Colombia sede Tunja

1 recurso en línea (89 páginas) : ilustraciones, figuras, tablas.Este documento presenta el diseño de la red de estacionamientos para bicicletas de la sede central de la Universidad Pedagógica y Tecnológica de Colombia producto de la investigación en la Escuela de Ingeniería de Transporte y Vías de la UPTC. En este se encuentra un estudio de la demanda manifiesta y potencial de bicicletas que dio como resultado después de su análisis el planteamiento de la red de estacionamientos con alternativas de tipo y geometría de estos últimos. El estudio de la demanda se realizó de dos formas. La primera fue mediante un aforo realizado durante un día significativo en un periodo de catorce (14) horas comprendido entre las 7:00 am y las 21:00 pm, en el cual los aforadores ubicados en cada entrada de la universidad contabilizaron los ingresos y salidas de usuarios de bicicleta en periodos de quince (15) minutos, obteniendo estos resultados se realizó una encuesta corta a una muestra de usuarios; teniendo como resultado la demanda manifiesta del modo. La segunda fue mediante encuestas realizadas a una determinada muestra de la población universitaria, dividiéndola en sectores tales como estudiantes, docentes, administrativos y funcionarios obteniendo así la percepción de la muestra y la demanda potencial. Con la información recolectada del aforo y las encuestas se relacionó la oferta y la demanda con el fin de determinar aspectos como la ubicación de los estacionamientos, la capacidad, el tipo, la geometría.Bibliografía y webgrafía: páginas 86-87.PregradoIngeniero de Transport

Microscopic theory of supercurrent suppression by gate-controlled surface depairing

Recently gate-mediated supercurrent suppression in superconducting nano-bridges has been reported in many experiments. This could be either a direct or an indirect gate effect. The microscopic understanding of this observation is not clear till now. Using the quasiclassical Green's function method, we show that a small concentration of magnetic impurities at the surface of the bridges can significantly help to suppress superconductivity and hence the supercurrent inside the systems while applying a gate field. This is because the gate field can enhance the depairing through the exchange interaction between the magnetic impurities at the surface and the superconductor. We also obtain a \emph{symmetric} suppression of the supercurrent with respect to the gate field, a signature of a direct gate effect. Future experiments can verify our predictions by modifying the surface with magnetic impurities