scholarly journals SOFTWARE BITSLICED IMPLEMENTATION OF KALYNA CIPHER IS ORIENTED TO USE SIMD INSTRUCTIONS FOR MICROPROCESSORS WITH X86-64 ARCHITECTURE

2020 ◽  
Vol 3 (7) ◽  
pp. 131-152
Author(s):  
Yаroslav Sovyn ◽  
Volodymyr Khoma
Keyword(s):  
High Speed ◽  
Data Representation ◽  
Third Party ◽  
Advantages And Disadvantages ◽  
Effective Implementation ◽  
Before And After ◽  
Basic Approaches ◽  
The Moment ◽  
Logic Functions ◽  
Logical Functions

The article is devoted to software bitsliced implementation of the Kalyna cipher using vector instructions SSE, AVX, AVX-512 for x86-64 processors. The advantages and disadvantages of different approaches to efficient and secure block cipher software implementation are shown. It is noted that bitslicing technology combines high speed and resistance to time and cache attacks, but its application to the Kalyna cipher is not available at the moment. The basic approaches to data representation and bitsliced encryption operations are considered, special attention is paid to the effective implementation of SubBytes operation, which largely determines the final performance. Existing methods for minimizing logical functions have been shown to either fail to produce the result in bitsliced format in the case of 8-bit non-algebraic SBoxs, or far from optimal. A heuristic algorithm for minimizing logic functions describing Kalyna SBoxes using the operations of AND, OR, XOR, NOT available in the instruction set of low- and high-end processors is proposed. The results show that a bitsliced description of one SBox requires about 520 gates, which is significantly less than other methods. Possible ways to increase performance by regrouping data into bitsliced variables before and after the SubBytes operation are indicated, which results in more efficient use of vector registers. The bitsliced implementations of Kalyna cipher were measured using C++ compilers from Microsoft and GCC for the Intel Xeon Skylake-SP processor. The results of the bitsliced Kalyna implementation can also be transferred to processors that do not support SIMD instructions, including low-end, to increase resistance to attacks through third-party channels. They also enable switching to ASIC or FPGA-based bitsliced implementation of Kalyna.

Problems of using it outsourcing for russian economy

2019 ◽  
pp. 5-13
Author(s):  
A. E. Kremin
Keyword(s):  
Business Processes ◽  
It Outsourcing ◽  
Human Potential ◽  
Advantages And Disadvantages ◽  
Effective Implementation ◽  
Russian Economy ◽  
Private And Public ◽  
The Russian Federation ◽  
The Moment ◽  
Regional Authorities

The article discusses the main advantages and disadvantages of using and developing IT outsourcing in the Russian Federation. The analysis of its essence and the dynamics of the relevant indicators that characterize the state of the studied sector of the economy. It is also proved its importance for both the private and public sectors of the economy. However, it is noted that the implementation of the main actions to digitalize the business processes of organizations has become an urgent area only in the last five years, and the main constraint affecting the achievement of the set goals of state development is the problem of the lack of IT specialists, which is being traced at the moment. Moreover, the implementation of managerial impact on this sector of the economy is complicated by the presence of freelance in the IT sector. In particular, its use contributes to an increase in the outflow of IT specialists to other countries for a number of significant reasons. This indicates the need to take appropriate steps on the part of regional authorities on the functioning and development of the IT sphere of both cities and the territories adjacent to them, in order to stimulate the employment processes of the studied category of specialists at Russian enterprises. As the main proposal for solving this problem, it is proposed to organize a dual education system in the IT sphere. Its effective implementation will help to create the human potential of the studied sector of the economy relevant for the Russian labor market in the region, thereby ensuring the employment of graduates at existing enterprises and stimulating the creation of new IT organizations.

scholarly journals Difference in racket head trajectory and muscle activity between the standard volley and the drop volley in tennis

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257295
Author(s):  
Ryosuke Furuya ◽  
Hikaru Yokoyama ◽  
Milos Dimic ◽  
Toshimasa Yanai ◽  
Tobias Vogt ◽  
...  
Keyword(s):  
Muscle Activity ◽  
High Speed ◽  
Gradual Increase ◽  
Ball Speed ◽  
Ball Impact ◽  
Video Cameras ◽  
Before And After ◽  
Arm Muscles ◽  
Set Up ◽  
The Moment

Among tennis coaches and players, the standard volley and drop volley are considered basically similar, but muscles need to be relaxed (deactivation) just at the moment of impact when hitting the drop volley. However, this is not evidence-based. The aim of this study was to clarify racket head trajectory and muscle activity during the drop volley and to compare them with those of the standard volley. We hypothesized that 1) the racket head would move less forward for the drop volley than for the standard volley and 2) the wrist and elbow muscles be relaxed for the drop volley at the time of ball impact. Eleven male college students with sufficient tennis experience volunteered to participate in this study. Wireless EMG sensors recorded activation of the four arm muscles. Each subject performed the standard volley or the drop volley with both a forehand and a backhand from a position near the net. Four high speed video cameras (300 Hz) were set up on the court to measure ball speed and racket head trajectory. Returned ball speed of the drop volley was significantly lower than that of the standard volley (p < 0.05). The racket head moved less forward than in the standard volley, supporting the first hypothesis. Muscle activity of the drop volley, just before and after ball impact for both the forehand and backhand, was lower than that of the standard volley. However, the activity was in the form of a gradual increase as impact time approached, rather than a sudden deactivation (relaxation), which did not support the second hypothesis. For the drop volley, lower muscle activity in the forearm enabled a softer grip and thus allowed a “flip” movement of the racket to diminish the speed of the returned ball.

EVALUATION OF THE EFECTS OF ELECTRONIC ACUPUNCTURE COMBINED WITH “TAM TY THANG” REMEDY IN THE TREATMENT OF RHEUMATOID ARTHRITIS BY WIND-COLD-DAMP

2017 ◽  
pp. 122-127
Author(s):  
Thi Luu Nguyen ◽  
Thi Tan Nguyen
Keyword(s):  
Rheumatoid Arthritis ◽  
Side Effects ◽  
Prospective Study ◽  
Key Words Rheumatoid Arthritis ◽  
Good Effect ◽  
Good Level ◽  
Relieve Pain ◽  
Level Of Activity ◽  
Before And After ◽  
The Moment

Objectives: To assess the effect of electronic acupuncture combined with “Tam ty thang” remedy in the treatment of rheumatoid arthritis by wind-cold-damp. Materials and methods: prospective study, comparing before and after treatment, including 43 patients who were diagnosed with rheumatoid arthritis by wind-cold-damp according to traditional medicine. Results: good level occupied 69,8%, and fair good level occupied 30,2%.The improved motor function accounted for 95.3%, to relieve pain up to 95,3%, reducing inflammation of VSS in 1 hour at the moment No 31,65, N28 17,88. The improvement in the level of activity of the hand reached 48,8% for good level. Conclusions: The method of electronic acupuncture combined with “Tam ty thang” remedy have a good effect in the treatment of rheumatoid arthritis by wind-cold-damp and it didn’t cause significantly side effects in clinic. Key words: rheumatoid arthritis, electronic acupuncture, “Tam ty thang” remedy

Recent Patents on the Angular Contact Ball Bearing of High-Speed Motorized Spindle

2020 ◽  
Vol 13 ◽  
Author(s):  
Yudong Bao ◽  
Linkai Wu ◽  
Yanling Zhao ◽  
Chengyi Pan
Keyword(s):  
High Speed ◽  
Ball Bearing ◽  
Rapid Development ◽  
Ceramic Materials ◽  
Development Trend ◽  
Numerical Control ◽  
Angular Contact Ball Bearing ◽  
Practical Applications ◽  
High Speed Cutting ◽  
Advantages And Disadvantages

Background:: Angular contact ball bearings are the most popular bearing type used in the high speed spindle for machining centers, The performance of the bearing directly affects the machining efficiency of the machine tool, Obtaining a higher value is the direction of its research and development. Objective:: By analyzing the research achievements and patents of electric spindle angular contact bearings, summarizing the development trend provides a reference for the development of electric spindle bearings. Methods:: Through the analysis of the relevant technology of the electric spindle angular contact ball bearing, the advantages and disadvantages of the angular contact ball bearing are introduced, and the research results are combined with the patent analysis. Results:: With the rapid development of high-speed cutting and numerical control technology and the needs of practical applications, the spindle requires higher and higher speeds for bearings. In order to meet the requirements of use, it is necessary to improve the bearing performance by optimizing the structure size and improving the lubrication conditions. Meanwhile, reasonable processing and assembly methods will also have a beneficial effect on bearing performance. Conclusion:: With the continuous deepening of bearing technology research and the use of new structures and ceramic materials has made the bearing's limit speed repeatedly reach new highs. The future development trend of high-speed bearings for electric spindles is environmental protection, intelligence, high speed, high precision and long life.

Power information network intrusion detection based on deep learning and cloud computing

2021 ◽  
pp. 1-9
Author(s):  
Xiangbing Zhao ◽  
Jianhui Zhou
Keyword(s):  
Cloud Computing ◽  
Deep Learning ◽  
Intrusion Detection ◽  
High Speed ◽  
Information Networks ◽  
Network Intrusion Detection ◽  
Information Network ◽  
Advantages And Disadvantages ◽  
Network Intrusion ◽  
Capture Mechanism

With the advent of the computer network era, people like to think in deeper ways and methods. In addition, the power information network is facing the problem of information leakage. The research of power information network intrusion detection is helpful to prevent the intrusion and attack of bad factors, ensure the safety of information, and protect state secrets and personal privacy. In this paper, through the NRIDS model and network data analysis method, based on deep learning and cloud computing, the demand analysis of the real-time intrusion detection system for the power information network is carried out. The advantages and disadvantages of this kind of message capture mechanism are compared, and then a high-speed article capture mechanism is designed based on the DPDK research. Since cloud computing and power information networks are the most commonly used tools and ways for us to obtain information in our daily lives, our lives will be difficult to carry out without cloud computing and power information networks, so we must do a good job to ensure the security of network information network intrusion detection and defense measures.

A Nonlinear Rail Vehicle Dynamics Computer Program SAMS/Rail: Part 1—Theory and Formulations

2009 ◽  
Author(s):  
Khaled E. Zaazaa ◽  
Brian Whitten ◽  
Brian Marquis ◽  
Erik Curtis ◽  
Magdy El-Sibaie ◽  
...  
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Contact Element ◽  
Contact Forces ◽  
Simulation Code ◽  
Vehicle Performance ◽  
Normal Contact ◽  
Advantages And Disadvantages ◽  
High Speed Trains

Accurate prediction of railroad vehicle performance requires detailed formulations of wheel-rail contact models. In the past, most dynamic simulation tools used an offline wheel-rail contact element based on look-up tables that are used by the main simulation solver. Nowadays, the use of an online nonlinear three-dimensional wheel-rail contact element is necessary in order to accurately predict the dynamic performance of high speed trains. Recently, the Federal Railroad Administration, Office of Research and Development has sponsored a project to develop a general multibody simulation code that uses an online nonlinear three-dimensional wheel-rail contact element to predict the contact forces between wheel and rail. In this paper, several nonlinear wheel-rail contact formulations are presented, each using the online three-dimensional approach. The methods presented are divided into two contact approaches. In the first Constraint Approach, the wheel is assumed to remain in contact with the rail. In this approach, the normal contact forces are determined by using the technique of Lagrange multipliers. In the second Elastic Approach, wheel/rail separation and penetration are allowed, and the normal contact forces are determined by using Hertz’s Theory. The advantages and disadvantages of each method are presented in this paper. In addition, this paper discusses future developments and improvements for the multibody system code. Some of these improvements are currently being implemented by the University of Illinois at Chicago (UIC). In the accompanying “Part 2” and “Part 3” to this paper, numerical examples are presented in order to demonstrate the results obtained from this research.

Risk factors of postthrombotic syndrome before and after deep venous thrombosis treatment

2016 ◽  
Vol 32 (6) ◽  
pp. 384-389 ◽  
Author(s):  
Rob HW Strijkers ◽  
Mark AF de Wolf ◽  
Cees HA Wittens
Keyword(s):  
Risk Factors ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Treatment Options ◽  
Postthrombotic Syndrome ◽  
Factor X ◽  
Catheter Directed Thrombolysis ◽  
Before And After ◽  
Patient Selection Criteria ◽  
The Moment

Postthrombotic syndrome is the most common complication after deep venous thrombosis. Postthrombotic syndrome is a debilitating disease and associated with decreased quality of life and high healthcare costs. Postthrombotic syndrome is a chronic disease, and causative treatment options are limited. Prevention of postthrombotic syndrome is therefore very important. Not all patients develop postthrombotic syndrome. Risk factors have been identified to try to predict the risk of developing postthrombotic syndrome. Age, gender, and recurrent deep venous thrombosis are factors that cannot be changed. Deep venous thrombosis location and extent seem to predict severity of postthrombotic syndrome and are potentially suitable as patient selection criteria. Residual thrombosis and reflux are known to increase the incidence of postthrombotic syndrome, but are of limited use. More recently developed treatment options for deep venous thrombosis, such as new oral factor X inhibitors and catheter-directed thrombolysis, are available at the moment. Catheter-directed thrombolysis shows promising results in reducing the incidence of postthrombotic syndrome after deep venous thrombosis. The role of new oral factor X inhibitors in preventing postthrombotic syndrome is still to be determined.

scholarly journals A Novel Graphical Technique for Combinational Logic Representation and Optimization

Complexity ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12
Author(s):  
Vedhas Pandit ◽  
Björn Schuller
Keyword(s):  
Boolean Functions ◽  
Discrete Systems ◽  
Boolean Logic ◽  
Decision Diagrams ◽  
New Paradigm ◽  
Binary Decision ◽  
Graphical Technique ◽  
A New Technique ◽  
Logic Functions ◽  
Logical Functions

We present a new technique for defining, analysing, and simplifying digital functions, through hand-calculations, easily demonstrable therefore in the classrooms. It can be extended to represent discrete systems beyond the Boolean logic. The method is graphical in nature and provides complete ‘‘implementation-free” description of the logical functions, similar to binary decision diagrams (BDDs) and Karnaugh-maps (K-maps). Transforming a function into the proposed representations (also the inverse) is a very intuitive process, easy enough that a person can hand-calculate these transformations. The algorithmic nature allows for its computing-based implementations. Because the proposed technique effectively transforms a function into a scatter plot, it is possible to represent multiple functions simultaneously. Usability of the method, therefore, is constrained neither by the number of inputs of the function nor by its outputs in theory. This, being a new paradigm, offers a lot of scope for further research. Here, we put forward a few of the strategies invented so far for using the proposed representation for simplifying the logic functions. Finally, we present extensions of the method: one that extends its applicability to multivalued discrete systems beyond Boolean functions and the other that represents the variants in terms of the coordinate system in use.

What Is the Impact of Prior Authorization on the Incidence of Pediatric Tonsillectomy?

2020 ◽  
pp. 019459982096963
Author(s):  
Vanessa F. Torrecillas ◽  
Kaden Neuberger ◽  
Alexander Ramirez ◽  
Paul Krakovitz ◽  
Jeremy D. Meier
Keyword(s):  
Elective Surgery ◽  
Lag Time ◽  
Cross Sectional Study ◽  
Health Claims ◽  
Third Party ◽  
Prior Authorization ◽  
Cross Sectional ◽  
Before And After ◽  
The Mean ◽  
The Impact

Objective Third-party payers advocate for prior authorization (PA) to reduce overutilization of health care resources. The impact of PA in elective surgery is understudied, especially in cases where evidence-based clinical practice guidelines define operative candidacy. The objective of this study is to investigate the impact of PA on the incidence of pediatric tonsillectomy. Study Design Cross-sectional study. Setting Health claims database from a third-party payer. Methods Any pediatric patient who had evaluation for tonsillectomy from 2016 to 2019 was eligible for inclusion. A time series analysis was used to evaluate the change in incidence of tonsillectomy before and after PA. Lag time from consultation to surgery before and after PA was compared with segmented regression. Results A total of 10,047 tonsillectomy claims met inclusion and exclusion criteria. Female patients made up 51% of claims, and the mean age was 7.9 years. Just 1.5% of claims were denied after PA implementation. There was no change in the incidence of tonsillectomy for all plan types ( P = .1). Increased lag time from consultation to surgery was noted immediately after PA implementation by 2.38 days (95% CI, 0.23-4.54; P = .030); otherwise, there was no significant change over time ( P = .98). Conclusion A modest number of tonsillectomy claims were denied approval after implementation of PA. The value of PA for pediatric tonsillectomy is questionable, as it did not result in decreased incidence of tonsillectomy in this cohort.

DEVELOPMENT OF AN ALGORITHM FOR FINDING ANOMALIES IN WEATHER REPORTS TO IMPROVE THE QUALITY OF FORECASTS

2021 ◽  
pp. 45-52
Author(s):  
K. G. Yashchenkov ◽  
K. S. Dymko ◽  
N. O. Ukhanov ◽  
A. V. Khnykin
Keyword(s):  
Optimal Method ◽  
Implementation Processes ◽  
Advantages And Disadvantages ◽  
Message Exchange ◽  
Text Information ◽  
Preliminary Preparation ◽  
Using Data ◽  
The Moment

The issues of using data analysis methods to find and correct errors in the reports issued by meteorologists are considered. The features of processing various types of meteorological messages are studied. The advantages and disadvantages of existing methods of classification of text information are considered. The classification methods are compared in order to identify the optimal method that will be used in the developed algorithm for analyzing meteorological messages. The prospects of using each of the methods in the developed algorithm are described. An algorithm for processing the source data is proposed, which consists in using syntactic and logical analysis to preclean the data from various kinds of noise and determine format errors for each type of message. After preliminary preparation the classification method correlates the received set of message characteristics with the previously trained model to determine the error of the current weather report and output the corresponding message to the operator in real time. The software tools used in the algorithm development and implementation processes are described. A complete description of the process of processing a meteorological message is presented from the moment when the message is entered in a text editor until the message is sent to the international weather message exchange service. The developed software is demonstrated, in which the proposed algorithm is implemented, which allows to improve the quality of messages and, as a result, the quality of meteorological forecasts. The results of the implementation of the new algorithm are described by comparing the number of messages containing various types of errors before the implementation of the algorithm and after the implementation.

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