scholarly journals A Hybrid Adaptive Transaction Injection Protocol and Its Optimization for Verification-Based Decentralized System

2019 ◽  
Vol 11 (8) ◽  
pp. 167 ◽  
Author(s):  
Saumendra Sengupta ◽  
Chen-Fu Chiang ◽  
Bruno Andriamanalimanana ◽  
Jorge Novillo ◽  
Ali Tekeoglu
Keyword(s):  
Critical Issue ◽  
Injection Rate ◽  
Hybrid Scheme ◽  
Decentralized System ◽  
Optimal Linear Combination ◽  
Basic Protocol ◽  
Optimal Linear ◽  
Speed Up ◽  
Injection Protocol ◽  
Verification Process

Latency is a critical issue that impacts the performance of decentralized systems. Recently we designed various protocols to regulate the injection rate of unverified transactions into the system to improve system performance. Each of the protocols is designed to address issues related to some particular network traffic syndrome. In this work, we first provide the review of our prior protocols. We then provide a hybrid scheme that combines our transaction injection protocols and provides an optimal linear combination of the protocols based on the syndromes in the network. The goal is to speed up the verification process of systems that rely on only one single basic protocol. The underlying basic protocols are Periodic Injection of Transaction via Evaluation Corridor (PITEC), Probabilistic Injection of Transactions (PIT), and Adaptive Semi-synchronous Transaction Injection (ASTI).

scholarly journals Verification Of Independent Study Assessment Using Blockchain Technology

2020 ◽  
Vol 2 (11) ◽  
pp. 15-21
Author(s):  
Ria Dwi I’zzaty
Keyword(s):  
Teaching And Learning ◽  
Independent Study ◽  
Assessment System ◽  
Learning System ◽  
Assessment Process ◽  
Decentralized System ◽  
Blockchain Technology ◽  
Technological Developments ◽  
Verification Process ◽  
Student Grades

Current technological developments greatly impact the assessment verification system. To find out the student benchmarks in the results of teaching and learning activities during the learning system assessment process is very important in the scope of higher education. With the existence of blockchain technology widely applied in the world of Education, having the advantage of a decentralized system and strong cryptography can help universities in building infrastructure. Universitas Raharja is one of the educational institutions that has implemented an online assessment system (PEN +), which will use blockchain technology to verify the assessment of independent studies. which provides services to Raharja University lecturers in verifying student grades that can be accessed anywhere and at any time. However, currently the verification process for the independent study assessment that has been carried out is still done manually which results in verification not with very strong security. The existence of an independent study assessment verification uses blockchain technology to produce strong data security that did not occur before. In the PEN + lecturer assessment system for the independent study assessment verification process, it cannot yet enter the value of Independent study (IS) in real time. Therefore, there is a need for development in this blockchain technology for the verification process of independent study assessment. In this study there were 10 (ten) literary studies on verification of valuation. Thus there are several benefits that lecturers need not hesitate to verify the assessment, the process by using blockchain technology produces very strong security.

scholarly journals Combining different ECG derived respiration tracking methods to create an optimal reconstruction of the breathing pattern

2015 ◽  
Vol 1 (1) ◽  
pp. 54-57 ◽  
Author(s):  
Gustavo Lenis ◽  
Felix Conz ◽  
Olaf Dössel
Keyword(s):  
Linear Combination ◽  
Breathing Pattern ◽  
Accurate Estimation ◽  
The Past ◽  
Optimal Linear Combination ◽  
Fixed Set ◽  
Optimal Linear ◽  
Respiration Signal ◽  
Electrocardiogram Ecg ◽  
Ecg Derived Respiration

AbstractECG derived respiration (EDR) is a technique applied to estimate the respiration signal using only the electrocardiogram (ECG). Different approaches have been proposed in the past on how respiration could be gained from the ECG. However, in many applications only one of them is used while the others are not considered at all. In this paper, we propose a new algorithm for the optimal linear combination of different EDR methods in order to create a more accurate estimation. Using two well known databases, it was statistically shown that an optimally chosen fixed set of coefficients for the linear combination delivers a better estimation than each of the methods used solely.

scholarly journals Calm Multi-Baryon Operators

2018 ◽  
Vol 175 ◽  
pp. 05029
Author(s):  
Evan Berkowitz ◽  
Amy Nicholson ◽  
Chia Cheng Chang ◽  
Enrico Rinaldi ◽  
M.A. Clark ◽  
...  
Keyword(s):  
Correlation Function ◽  
Excited State ◽  
Variational Method ◽  
Linear Combination ◽  
Correlation Functions ◽  
Nuclear Physics ◽  
Physical Point ◽  
Euclidean Time ◽  
Optimal Linear Combination ◽  
Optimal Linear

There are many outstanding problems in nuclear physics which require input and guidance from lattice QCD calculations of few baryons systems. However, these calculations suffer from an exponentially bad signal-to-noise problem which has prevented a controlled extrapolation to the physical point. The variational method has been applied very successfully to two-meson systems, allowing for the extraction of the two-meson states very early in Euclidean time through the use of improved single hadron operators. The sheer numerical cost of using the same techniques in two-baryon systems has so far been prohibitive. We present an alternate strategy which offers some of the same advantages as the variational method while being significantly less numerically expensive. We first use the Matrix Prony method to form an optimal linear combination of single baryon interpolating fields generated from the same source and different sink interpolating fields. Very early in Euclidean time this optimal linear combination is numerically free of excited state contamination, so we coin it a calm baryon. This calm baryon operator is then used in the construction of the two-baryon correlation functions.To test this method, we perform calculations on the WM/JLab iso-clover gauge configurations at the SU(3) flavor symmetric point with mπ~ 800 MeV — the same configurations we have previously used for the calculation of two-nucleon correlation functions. We observe the calm baryon significantly removes the excited state contamination from the two-nucleon correlation function to as early a time as the single-nucleon is improved, provided non-local (displaced nucleon) sources are used. For the local two-nucleon correlation function (where both nucleons are created from the same space-time location) there is still improvement, but there is significant excited state contamination in the region the single calm baryon displays no excited state contamination.

scholarly journals Robust historical evapotranspiration trends across climate regimes

2020 ◽  
Author(s):  
Sanaa Hobeichi ◽  
Gab Abramowitz ◽  
Jason Evans
Keyword(s):  
Land Surface ◽  
Climate Extremes ◽  
Historical Period ◽  
Hybrid Techniques ◽  
Time Period ◽  
Optimal Linear Combination ◽  
Uncertainty Estimates ◽  
Out Of Sample ◽  
Physically Based ◽  
Optimal Linear

Abstract. Evapotranspiration (ET) links the hydrological, energy, and carbon cycle on the land surface. Quantifying ET and its spatiotemporal changes is also key to understanding climate extremes such as droughts, heatwaves and flooding. Regional ET estimates require reliable observationally-based gridded ET datasets, and while many have been developed using physically-based, empirically-based and hybrid techniques, their efficacy, and particularly the efficacy of their uncertainty estimates, is difficult to verify. In this work, we extend the methodology used in Hobeichi et al. (2018) to derive a new version of the Derived Optimal Linear Combination Evapotranspiration (DOLCE) product, with observationally constrained spatiotemporally varying uncertainty estimates, higher spatial resolution, more constituent products and extended temporal reach (1980–2018). After successful evaluation of the efficacy of these uncertainty estimates out-of-sample, we derive novel ET climatology clusters for the land surface, based on the magnitude and variability of ET at each location. The verified uncertainty estimates and extended time period then allow us to examine the robustness of historical trends spatially and in each of these six ET climatology clusters. We find that despite robust decreasing ET trends in some regions, these do not correlate with behavioural ET clusters. Each cluster, and the vast majority of the Earth's surface, show clear robust increases in ET over the recent historical period.

World Wide Wait

2011 ◽  
pp. 146-161 ◽  
Author(s):  
Fui Hoon Nah ◽  
Kihyun Kim
Keyword(s):  
Waiting Time ◽  
World Wide ◽  
Information Access ◽  
Critical Issue ◽  
Web Pages ◽  
Internet Connection ◽  
Internet Users ◽  
Speed Up ◽  
Institute Of Technology ◽  
Web Designers

The explosive popularity of the World Wide Web (WWW) is the biggest event in the Internet era. Since its public introduction in 1991, WWW has become an important channel for electronic commerce, information access, and publication. With exponential growth in the WWW market, Internet connection speed has become a critical issue. The long waiting time for accessing web pages has always been a major problem for WWW users (Lightner, Bose and Salvendy, 1996), especially with the increasing use of multimedia technology and the doubling of Internet users every 18-24 months. A recent survey conducted by the GVU (Graphic, Visualization, & Usability) Center at the Georgia Institute of Technology also indicates long downloading time to be the biggest problem experienced by WWW users (GVU, October 1998). This problem is so noticeable that WWW users sometimes equate the “WWW” acronym with “World Wide Wait”! Although information technology for supporting the infrastructure of WWW is continually being updated and improved, it is still not able to satisfy industry requirements and demand. In this chapter, we review the usage pattern of WWW as well as topics related to speed of Internet access such as bandwidth, Internet connection alternatives, and technology to speed up WWW access. In addition, we report an experimental research that measured and analyzed users’ “tolerable” waiting time in accessing the WWW. Based on the results of the study, we provide guidelines for web designers regarding page size restrictions in web development.

Sign in / Sign up

Export Citation Format

Share Document