scholarly journals DoS Protection through Credit Based Metering - Simulation-Based Evaluation for Time-Sensitive Networking in Cars

10.29007/pxrk ◽  
2019 ◽  
Author(s):  
Philipp Meyer ◽  
Timo Häckel ◽  
Franz Korf ◽  
Thomas Schmidt

Ethernet is the most promising solution to reduce complexity and enhance the band- width in the next generation in-car networks. Dedicated Ethernet protocols enable the real-time aspects in such networks. One promising candidate is the IEEE 802.1Q Time- Sensitive Networking protocol suite. Common Ethernet technologies, however, increases the vulnerability of the car infrastructure as they widen the attack surface for many com- ponents. In this paper proposes an IEEE 802.1Qci based algorithm that on the one hand, protects against DoS attacks by metering incoming Ethernet frames. On the other hand, it adapts to the behavior of the Credit Based Shaping algorithm, which was standardized for Audio/Video Bridging, the predecessor of Time-Sensitive Networking. A simulation of this proposed Credit Based Metering algorithm evaluates the concept.

2018 ◽  
pp. 49-68 ◽  
Author(s):  
M. E. Mamonov

Our analysis documents that the existence of hidden “holes” in the capital of not yet failed banks - while creating intertemporal pressure on the actual level of capital - leads to changing of maturity of loans supplied rather than to contracting of their volume. Long-term loans decrease, whereas short-term loans rise - and, what is most remarkably, by approximately the same amounts. Standardly, the higher the maturity of loans the higher the credit risk and, thus, the more loan loss reserves (LLP) banks are forced to create, increasing the pressure on capital. Banks that already hide “holes” in the capital, but have not yet faced with license withdrawal, must possess strong incentives to shorten the maturity of supplied loans. On the one hand, it raises the turnovers of LLP and facilitates the flexibility of capital management; on the other hand, it allows increasing the speed of shifting of attracted deposits to loans to related parties in domestic or foreign jurisdictions. This enlarges the potential size of ex post revealed “hole” in the capital and, therefore, allows us to assume that not every loan might be viewed as a good for the economy: excessive short-term and insufficient long-term loans can produce the source for future losses.


1851 ◽  
Vol 1 (1) ◽  
pp. 40-46
Author(s):  
Edwin James Farren

The term scholar, as current in the English language, has two extreme acceptations, tyro and proficient; or what the later Greeks fancifully termed the alpha and omega of acquirement. If we attempt to trace the steps by which even the adult student of any especial branch of professional or literary knowledge has fairly passed the boundary defined by the one meaning in passing on to that position denoted by the other, it will commonly be found, that in place of that lucid order, that straight line from point to point, which theory and resolve generally premise, the real order of acquirement has been desultory—the real line of progression, circuitous and uncertain.


2017 ◽  
Vol 16 (4) ◽  
pp. 551-565 ◽  
Author(s):  
Ruth Wodak

Abstract In this paper, I discuss the attempt by all right-wing populist parties to create, on the one hand, the ‘real’ and ‘true’ people; and on the other, the ‘élites’ or ‘the establishment’ who are excluded from the true demos. Such divisions, as will be elaborated in detail, have emerged in many societies over centuries and decades. A brief example of the arbitrary construction of opposing groups illustrates the intricacies of such populist reasoning. Furthermore, I pose the question why such divisions resonate so well in many countries? I argue that – apart from a politics of fear (Wodak 2015) – much resentment is evoked which could be viewed as both accompanying as well as a reaction to the disenchantment with politics and the growing inequalities in globalized capitalist societies.


2017 ◽  
Vol 17 (9) ◽  
pp. 3-14
Author(s):  
Agustinus Supriyadi

Catholic teens Indonesia is part of the Church in Indonesia and the Indonesian people. Indonesia consists of thousands of islands that stretched from Sabang to Merauke. This fact opens the possibility of a fairly wide occurrence of the encounter between cultures and simultaneous cross-cultural. This diversity is certainly a logical consequence to an enrichment of civilizations and diversity (plurality), although also contains elements of the loss. Plurality of Indonesian society on the one hand can make the Catholic teens swept away in the swift currents of the community to lose our identity or conflict. However Plurality can also awaken in the Catholic teen award nature between one race to the other races, between ethnic or tribal one with the other tribes, between groups with one another. In a pluralistic society such as this, the Catholic teens called to the apostolate. Through the act of self-discovery, live in love and have a sense of tolerance of differences is the real form of the apostolate.


2017 ◽  
Vol 1 (13) ◽  
pp. 33-48
Author(s):  
Myroslava Khutorna

This paper is devoted to the consideration of the preconditions and results of the banking sector of Ukraine transforming, its influence on the sector’s productivity, stability and significance for the real economy. It’s grounded that banking sector of Ukraine has seriously weakened its potential for the economic development stimulation. On the one hand, due to the banking sector clearance from the bad and unscrupulous banks the system has become much more sensitive to the monetary instruments and its state is going to be more predictable and better controlled. But on the other hand, massive banks’ liquidations have caused the worsening of the confidence in financial system and radical increasing of the market concentration the highest degree of which is observed in the householders’ deposit market.


1999 ◽  
Author(s):  
Bo-Chiuan Chen ◽  
Huei Peng

Abstract A Time-To-Rollover (TTR) metric is proposed as the basis to assess rollover threat for an articulated vehicle. Ideally, a TTR metric will accurately “count-down” toward rollover regardless of vehicle speed and steering patterns, so that the level of rollover threat is accurately indicated. To implement TTR in real-time, there are two conflicting requirements. On the one hand, a faster-than-real-time model is needed. On the other hand, the TTR predicted by this model needs to be accurate enough under all driving scenarios. An innovative approach is proposed in this paper to solve this dilemma and the whole process is illustrated in a design example. First, a simple yet reasonably accurate yaw/roll model is identified. A Neural Network (NN) is then developed to mitigate the accuracy problem of this simplified real-time model. The NN takes the TTR generated by the simplified model, vehicle roll angle and change of roll angle to generate an enhanced NN-TTR index. The NN was trained and verified under a variety of driving patterns. It was found that an accurate TTR is achievable across all the driving scenarios we tested.


Author(s):  
Hocine Chebi

Camera placement in a virtual environment consists of positioning and orienting a 3D virtual camera so as to respect a set of visual or cinematographic properties defined by the user. Carrying out this task is difficult in practice. Indeed, the user has a clear vision of the result he wants to obtain in terms of the arrangement of the objects in the image. In this chapter, the authors identify three areas of research that are relatively little covered by the literature dedicated to camera placement and which nevertheless appear essential. On the one hand, existing approaches offer little flexibility in both solving and describing a problem in terms of visual properties, especially when it has no solution. They propose a flexible solution method which computes the set of solutions, maximizing the satisfaction of the properties of the problem, whether it is over constrained or not. On the other hand, the existing methods calculate only one solution, even when the problem has several classes of equivalent solutions in terms of satisfaction of properties. They introduce the method of semantic volumes which computes the set of classes of semantically equivalent solutions and proposes a representative of each of them to the user. Finally, the problem of occlusion, although essential in the transmission of information, is little addressed by the community. Consequently, they present a new method of taking into account occlusion in dynamic real-time environments.


2021 ◽  
pp. 150-152
Author(s):  
David Evans

In this chapter I compare settings of Verlaine’s ‘La Lune blanche’ (‘The White Moon’) by composers of different nationalities (Delius, Webern, Sorabji, Loomis, Nevin, Loeffler, Hennessy, Poldowski, McEwen, Szulc, Stravinsky) in order to show how different ideas of French song – and of art song itself – emerge through the multiple dialogues of its transnational crossings. Two opposing approaches become clear: on the one hand, songs which maintain a reverence towards the source text as a symbol of the cultural cachet which French mélodie has enjoyed since its 1880-1930 heyday; and on the other, songs which offer a curiously unplaceable musical material, staking a claim for music as an mode of articulation which functions independently from language and, indeed, from national identities which are always in danger of falling into repetition, cliché, and pastiche. This latter mode, I suggest, comes closest to the real heart of mélodie as understood by its foremost French purveyors, Fauré and Debussy, and which composers like Stravinsky draw out of Verlaine’s text: a conception of song as an art form uniquely placed to offer a critique of fixed national paradigms and stable interpretative systems, by constantly calling into question, through their formal complexities, the very processes by which meaning itself is produced.


The principal kinetic theories of a gas proceed either on the hypothesis that the molecules are rigid elastic spheres, or that they are point centres of forces which vary inversely as the fifth power of the distance. Maxwell has worked out the consequences of the letter hypothesis in his well-known theory, which is unrivalled in its high degree of accuracy and (after some improvements by Boltzmann) in its perfection of mathematical form. All the quantities not taken account of in the theory (such as the time occupied by molecular encounters, and the effect of collisions in which more than two molecules take part) are properly negligible under ordinary conditions. The theory has the disadvantage, however, that the underlying hypothesis is highly artificial (being chosen chiefly on account of mathematical simplifications connected with it, rather than from any physical reasons), and does not represent the real facts at all adequately. The other hypothesis referred to seems to be much more in agreement with fact, but its consequences have been worked out less accurately. The method which has almost always been used is the one originally devised by Clausius and Maxwell; Maxwell abandoned it later, however, as it had “led him at times into grave error.” In spite of its apparent simplicity, numerical errors of large amount may undoubtedly creep in in a very subtle way. Hence the theory of a gas whose molecules are elastic spheres remains in a rather unsatisfactory state. As a “descriptive” theory (to use Meyer’s apt term) it has, however, served a useful purpose; the general laws of gaseous phenomena have been developed by its aid in an elementary way, which has conduced to a wider diffusion of knowledge of the kinetic theory than would have been possible if the sole line of development had been by the more mathematical and accurate methods used by Maxwell and Boltzmann.


1997 ◽  
Vol 53 (4) ◽  
Author(s):  
Kobus Labuschagne

On the existence of God and on nothingness The views of Karl Barth and the 'Heilsgeschichte'-tradition on the one hand, and those of Rudolf Bultmann and the 'Formkritik'-tradition on the other hand, do not differ so much on the method of objective historical research. The real differences start to appear on the hermeneutical front, where facts and events referred to in the Scriptures are evaluated and explained. The 'Heilsgeschichte' -tradition is consistent in maintaining an objective point of departure, whilst Bultmann and the 'Form-kritik'-tradition, influenced by existentialist philosophy, reveals a subjective approach. For Bultmann the kerygma cannot be verified historically but only subjectively or existentially. For Barth the kerygma cannot be separated from its true basis of historical events, in and through the person of Jesus Christ. These two different approaches have enormous con-sequences for the question of the existence of God.


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