Moral Revolutions: The Politics of Piety in the Ottoman Empire Reimagined

AbstractOver the sixteenth and seventeenth centuries an immense body of morality literature emerged in the Ottoman Empire as part of a widespread turn to piety. This article draws upon the anthropology of Islamic revival and secularism to reassess this literature's importance and propose a new view of the history of political thought in the empire. It does so through a close analysis of a fundamental concept of Ottoman political life: “naṣīḥat, ” or “advice.” Historians have used “advice books” to counter the presumption that the Ottoman Empire declined after the sixteenth century, but in doing so they have overlooked the concept's broader meaning as “morally corrective criticism.” I analyze two competing visions of naṣīḥat at the turn of the eighteenth century to reveal how the concept was deployed to politically transform the empire by reforming its subjects’ morality. One was a campaign by the chief jurist Feyżullah Efendi to educate every Muslim in the basic tenets of Islam. The other was a wildly popular “advice book” written by the poet Nābī to his son that both explicates a new moral code and declares the empire's government and institutions illegitimate. Both transformed politics by requiring that all subjects be responsible moral, and therefore political, actors. The pietistic turn, I argue, turned domestic spaces into political battlegrounds and ultimately created new, individualistic political subjectivities. This, though, requires challenging functionalist conceptions of the relationship between religion and politics and the secularist inclination among historians to relegate morality to the private sphere

Polyelectrolytes Adsorption: Chemical and Electrostatic Interactions

Mean-field theory is used to model polyelectrolyte adsorption and the possibility of overcompensation of charged surfaces. For charged surfaces that are also chemically attractive, the overcharging is large in high salt conditions, amounting to 20-40% of the bare surface charge. However, full charge inversion is not obtained in thermodynamical equilibrium for physical values of the parameters. The overcharging increases with addition of salt, but does not have a simple scaling form with the bare surface charge. Our results indicate that more evolved explanation is needed in order to understand polyelectrolyte multilayer built-up. For strong polymer-repulsive surfaces, we derive simple scaling laws for the polyelectrolyte adsorption and overcharging. We show that the overcharging scales linearly with the bare surface charge, but its magnitude is very small in comparison to the surface charge. In contrast with the attractive surface, here the overcharging is found to decrease substantially with addition of salt. In the intermediate range of weak repulsive surfaces, the behavior with addition of salt crosses over from increasing overcharging (at low ionic strength) to decreasing one (at high ionic strength). Our results for all types of surfaces are supported by full numerical solutions of the mean-field equations.Comment: 17 pages, 7 figures, final version. to be published in PR

Adsorption and Depletion of Polyelectrolytes from Charged Surfaces

Mean-field theory and scaling arguments are presented to model polyelectrolyte adsorption from semi-dilute solutions onto charged surfaces. Using numerical solutions of the mean-field equations, we show that adsorption exists only for highly charged polyelectrolytes in low salt solutions. Simple scaling laws for the width of the adsorbed layer and the amount of adsorbed polyelectrolyte are obtained. In other situations the polyelectrolyte chains will deplete from the surface. For fixed surface potential conditions, the salt concentration at the adsorption--depletion crossover scales as the product of the charged fraction of the polyelectrolyte f and the surface potential, while for a fixed surface charge density, \sigma, it scales as \sigma^{2/3}f^{2/3}, in agreement with single-chain results.Comment: 12 pages, 8 figures, final version to be published in J. Chem. Phys. 200

NXNSAttack: Recursive DNS Inefficiencies and Vulnerabilities

This paper exposes a new vulnerability and introduces a corresponding attack, the NoneXistent Name Server Attack (NXNSAttack), that disrupts and may paralyze the DNS system, making it difficult or impossible for Internet users to access websites, web e-mail, online video chats, or any other online resource. The NXNSAttack generates a storm of packets between DNS resolvers and DNS authoritative name servers. The storm is produced by the response of resolvers to unrestricted referral response messages of authoritative name servers. The attack is significantly more destructive than NXDomain attacks (e.g., the Mirai attack): i) It reaches an amplification factor of more than 1620x on the number of packets exchanged by the recursive resolver. ii) In addition to the negative cache, the attack also saturates the 'NS' section of the resolver caches. To mitigate the attack impact, we propose an enhancement to the recursive resolver algorithm, MaxFetch(k), that prevents unnecessary proactive fetches. We implemented the MaxFetch(1) mitigation enhancement on a BIND resolver and tested it on real-world DNS query datasets. Our results show that MaxFetch(1) degrades neither the recursive resolver throughput nor its latency. Following the discovery of the attack, a responsible disclosure procedure was carried out, and several DNS vendors and public providers have issued a CVE and patched their systems

Political antisemitism in Romania? Hard data and its soft underbelly

Public opinion polling on ethnic minorities has shown from the start that while negative or ambivalent attitudes to Jews in Romania are far from having vanished, they do not affect a spectrum as large as that of anti-Roma attitudes and prejudices. Subsequent surveying carried out in the late 1990s and early 2000s confirmed the earlier findings by studies measuring stereotypical perceptions or social distance. Yet it would be an exaggeration to state that antisemitism is not a factor influencing social attitudes or even the perception of politics by the population. The Romanian surveys available thus far did not measure latent antisemitism and they lack the sophistication inquiring what stands behind "non-committal don't knows" and "no answers". Holocaust-related surveys seem to indicate that only a small minority is interested in this aspect and even among its members information is often partial at best. It is therefore difficult to predict whether "political antisemitism" could emerge in post-communist Romania as it did in neighboring Hungary. The Hungarian and other experiences, however, demonstrate that political antisemitism can become a factor when for reasons other than anti-Jewish attitudes political parties, influential intellectuals and other social entrepreneurs condone and utilize themselves implicit antisemitism of which they are not always aware. The last part of the article illustrates such potentially contributing factors and actors utilizing qualitative rather than quantitative analysis

Bending Moduli of Charged Membranes Immersed in Polyelectrolyte Solutions

We study the contribution of polyelectrolytes in solution to the bending moduli of charged membranes. Using the Helfrich free energy, and within the mean-field theory, we calculate the dependence of the bending moduli on the electrostatics and short-range interactions between the membrane and the polyelectrolyte chains. The most significant effect is seen for strong short-range interactions and low amounts of added salt where a substantial increase in the bending moduli of order $1 k_BT$ is obtained. From short-range repulsive membranes, the polyelectrolyte contribution to the bending moduli is small, of order $0.1 k_BT$ up to at most $1 k_BT$. For weak short-range attraction, the increase in membrane rigidity is smaller and of less significance. It may even become negative for large enough amounts of added salt. Our numerical results are obtained by solving the adsorption problem in spherical and cylindrical geometries. In some cases the bending moduli are shown to follow simple scaling laws.Comment: 16 pages, 6 figure

Phase Behavior of Polyelectrolyte-Surfactant Complexes at Planar Surfaces

We investigate theoretically the phase diagram of an insoluble charged surfactant monolayer in contact with a semi-dilute polyelectrolyte solution (of opposite charge). The polyelectrolytes are assumed to have long-range and attractive (electrostatic) interaction with the surfactant molecules. In addition, we introduce a short-range (chemical) interaction which is either attractive or repulsive. The surfactant monolayer can have a lateral phase separation between dilute and condensed phases. Three different regimes of the coupled system are investigated depending on system parameters. A regime where the polyelectrolyte is depleted due to short range repulsion from the surface, and two adsorption regimes, one being dominated by electrostatics, whereas the other by short range chemical attraction (similar to neutral polymers). When the polyelectrolyte is more attracted (or at least less repelled) by the surfactant molecules as compared with the bare water/air interface, it will shift upwards the surfactant critical temperature. For repulsive short-range interactions the effect is opposite. Finally, the addition of salt to the solution is found to increase the critical temperature for attractive surfaces, but does not show any significant effect for repulsive surfaces.Comment: 23 pages, 10 figure