A feasibility study of stateful automaton packet inspection for streaming application detection systems

The rapid development of the internet has brought huge benefits and social impacts; however, internet security has also become a great problem for users, since traditional approaches to packet classification cannot achieve satisfactory detection performance due to their low accuracy and efficiency. In this paper, a new stateful packet inspection method is introduced, which can be embedded in the network gateway and used by a streaming application detection system. This new detection method leverages the inexact automaton approach, using part of the header field and part of the application layer data of a packet. Based on this approach, an advanced detection system is proposed for streaming applications. The workflow of the system involves two stages: the training stage and the detection stage. In the training stage, the system initially captures characteristic patterns from a set of application packet flows. After this training is completed, the detection stage allows the user to detect the target application by capturing new application flows. This new detection approach is also evaluated using experimental analysis; the results of this analysis show that this new approach not only simplifies the management of the state detection system, but also improves the accuracy of data flow detection, making it feasible for real-world network applications.     

$${\phi_p}$$-optimal designs for a linear log contrast model for experiments with mixtures

A mixture experiment is an experiment in which the k ingredients are nonnegative and subject to the simplex restriction on the (k − 1)-dimensional probability simplex S ^k-1. In this work, an essentially complete class of designs under the Kiefer ordering for a linear log contrast model with a mixture experiment is presented. Based on the completeness result, -optimal designs for all p,−∞ ≤ p ≤ 1 including D- and A-optimal are obtained, where the eigenvalues of the design moment matrix are used. By using the approach presented here, we gain insight on how these -optimal designs behave. Mong-Na Lo Huang was supported in part by the National Science Council of Taiwan, ROC under grant NSC 93-2118-M-110-001.     

Bitcoin mining: converting computing power into cash flow

Bitcoin is the world’s leading cryptocurrency, with a market capitalization briefly exceeding $300 billion. This hints at Bitcoin’s amorphous nature: Is this a monetary or a corporate measure? Hard values become explicit in the processing of transactions and the digital mining of Bitcoins. Electricity is a primary input cost. Bitcoins earned are often used to circumvent local currency controls and acquire US dollars. For the period August 2010 to February 2018, we examine the financial components of Bitcoin mining revenues, their statistical contribution to daily changes, and to its variance. We provide empirical evidence that Bitcoin transaction processing is capacity constrained.     

Information disclosure,transparency ranking system and firms’ value deviation: evidence from Taiwan

Review of Quantitative Finance and Accounting - We examine whether the implementation of the information disclosure and transparency ranking system (IDTRS) affects firms’ value deviation in...     

The influence of management perception of environmental variables on the choice of international transfer-pricing methods

In this paper, we provide an empirical study of the association between the management's perception of the importance of environmental variables and their choice of international transfer-pricing methods in the context of a developing economy. Given the sizable investment flowing to developing countries and the amount of economic exchange that occurs through foreign investment in these countries, we believe this is a significant issue. For this study, we collected the data from field interviews with the management of large foreign investment enterprises (FIEs) in China. These FIEs include mainly investors from the United States, Japan, and Europe. Our evidence indicates that the more important management perceives the interests of local partners and the maintenance of a good relationship with host government to be, the more likely that the FIE will use a market-based transfer-pricing method. On the other hand, the more important the management perceives foreign exchange controls in transfer-pricing decisions, the more likely the FIE will choose a cost-based method. Finally, there is a moderate agreement between U.S. and non-U.S. FIEs on the relative importance of the environmental variables.     

sk−p Fractional factorial designs in sb blocks

Draper and Guttman (1997) shows that for basic 2^k−p designs, p≥0, k − p replicates of blocks designs of size two are needed to estimate all the usual (estimable) effects. In this work, we provide an algebraic formal proof for the two-level blocks designs results and present results applicable to the general case; that is, for the case of s ^k factorial (p=0) or s ^k−p fractional factorial (p >0) designs in s ^b blocks, where 0<b<k− p, at least replicates are needed to clear up all possible effects. Through the theoretical development presented in this work, it can provide a clearer view on why those results would hold. We will also discuss the estimation equations given in Draper and Guttman (1997).  Research supported in part by the National Science Council of Taiwan, R.O.C., Grant No. NSC 89-2118-M110-010. Acknowledgement. The authors would like to thank the referee for very helpful comments.