Shows that the politics of democratic societies is moving towards a presidentialized working mode, even in the absence of formal institutional changes. These developments can be explained by a ...combination of long-term structural changes in modern politics and societies’ contingent factors that fluctuate over time. While these contingent, short-term factors relate to the personalities of office holders, the overall political agenda, and the majority situation in parliament, there are several structural factors that are relatively uniform across modern nations. First, the internationalization of modern politics (which is particularly pronounced within the European Union) has led to an ‘executive bias’ of the political process that has strengthened the role of political top elites vis-à-vis their parliamentary groups and/or their parties. Their predominance has been amplified further by the vastly expanded steering capacities of state machineries, which have severely reduced the scope of effective parliamentary control. At the same time, the declining stability of political alignments has increased the proportion of citizens whose voting decisions are not constrained by long-standing party loyalties. In conjunction with the mediatization of politics, this has increased the capacity of political leaders to bypass their party machines and to appeal directly to voters.As a result, three interrelated processes have led to a political process increasingly moulded by the inherent logic of presidentialism: increasing leadership power and autonomy within the political executive; increasing leadership power and autonomy within political parties; and increasingly leadership-centered electoral processes.The book presents evidence for this process of presidentialization for 14 modern democracies (including the USA and Canada). While there are substantial cross-national differences, the overall thesis holds: modern democracies are increasingly following a presidential logic of governance through which leadership is becoming more central and more powerful, but also increasingly dependent on successful immediate appeal to the mass public. Implications for democratic theory are considered.
Stability versus Maneuvering Webb, Paul W.; Weihs, Daniel
Integrative and comparative biology,
10/2015, Letnik:
55, Številka:
4
Journal Article
Recenzirano
Odprti dostop
Fishes are well known for their remarkable maneuverability and agility. Less visible is the continuous control of stability essential for the exploitation of the full range of aquatic resources. ...Perturbations to posture and trajectory arise from hydrostatic and hydrodynamic forces centered in a fish (intrinsic) and from the environment (extrinsic). Hydrostatic instabilities arise from vertical and horizontal separation of the centers of mass (CM) and of buoyancy, thereby creating perturbations in roll, yaw, and pitch, with largely neglected implications for behavioral ecology. Among various forms of hydrodynamic stability, the need for stability in the face of recoil forces from propulsors is close to universal. Destabilizing torques in body-caudal fin swimming is created by inertial and viscous forces through a propulsor beat. The recoil component is reduced, damped, and corrected in various ways, including kinematics, shape of the body and fins, and deployment of the fins. We postulate that control of the angle of orientation, θ, of the trailing edge is especially important in the evolution and lifestyles of fishes, but studies are few. Control of stability and maneuvering are reflected in accelerations around the CM. Accelerations for such motions may give insight into time-behavior patterns in the wild but cannot be used to determine the expenditure of energy by free-swimming fishes.
Thyroid hormones influence heart rate, serum lipids, metabolic rate, body weight and multiple aspects of lipid, carbohydrate, protein and mineral metabolism. Although increased thyroid hormone levels ...can improve serum lipid profiles and reduce fat, these positive effects are counterbalanced by harmful effects on the heart, muscle and bone. Thus, attempts to use thyroid hormones for cholesterol-lowering and weight loss purposes have so far been limited. However, over the past decade, thyroid hormone analogues that are capable of uncoupling beneficial effects from deleterious effects have been developed. Such drugs could serve as powerful new tools to address two of the largest medical problems in developed countries--atherosclerosis and obesity.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Particle size does not affect the intrinsic activity of silica-supported nickel nanoparticles in dry reforming at 500°C. Display omitted
► Different silica supported nickel catalyst prepared with ...varying particle size (1.6–7.3nm). ► Neutral silica support favours a very high reduction degree (> 90%) at 500°C. ► Intrinsic Ni/SiO2 performances are independent of nickel particle size in dry reforming at 773K. ► The H2/CO ratio is controlled by the thermodynamic of the fast reverse water gas shift reaction.
The influence of nickel particle size in the range of 1.6–7.3nm on catalyst performance in low temperature CO2 reforming of methane reaction has been investigated using well-defined catalysts based on a neutral silica support. XAS and XPS studies indicated a reduction degree greater than 90%. The intrinsic Ni/SiO2 performances were found to be independent of nickel particle size in dry reforming at 773K using a CH4/CO2 ratio of 1.3 at 1atm, both at an early stage and in steady state conditions. The H2/CO ratio was also found to be structure in sensitive but is controlled by thermodynamics through the faster reverse water gas shift reaction.
Inelastic neutron scattering (INS) is employed to examine the evolution of a promoter-free iron-based Fischer–Tropsch synthesis catalyst (∼10 g catalyst charge) that is exposed to ambient pressure CO ...hydrogenation at 623 K for up to 10 days time-on-stream (T-o-S). The longer reaction time is selected to better understand how the formation of a previously described hydrocarbonaceous overlayer corresponds to the catalyst conditioning process. Although the onset of pseudo steady-state reactor performance is observed at approximately 9 h T-o-S, INS establishes that the intensity of the C–H stretching mode of the sp3-hybridized component of the hydrocarbonaceous overlayer saturates at about 24 h T-o-S, while the corresponding intensity of the C–H stretching mode of the sp2-hybridized component requires 100–200 h T-o-S to achieve saturation. This novel series of measurements reveal different aspects of the complex catalyst evolutionary process to be indirectly connected with catalytic turnover.
The importance of amorphous calcium carbonate (ACC) as a precursor phase in the biomineralization of marine calcifiers is increasingly being reported, particularly as the presence of ACC has been ...observed or inferred in several major groups. Here, we investigate the structure of ACC and the conditions required for its precipitation from seawater-based solutions, with an emphasis on the coinfluence of the carbonate system (pH, dissolved inorganic carbon (DIC) concentration), seawater Mg/Ca ratio, and presence of amino acids. We find that Mg2+ and the presence of aspartic acid, glutamic acid, and glycine strongly inhibit ACC precipitation. Moreover, we were unable to precipitate ACC from seawater with a carbonate chemistry within the range of that thought to characterize the calcification site of certain marine calcifiers (i.e., DIC < 6 mM, pH < 9.3), although substantial modification of the seawater Mg/Ca ratio (Mg/Casw) allowed precipitation at a reduced DIC with the implication that this could be an important component of utilizing an ACC pathway. In addition, the degree to which Mg/Casw and the presence of amino acids influences the structure of ACC and the necessary seawater CO3 2– for precipitation is strongly pH dependent. At lower, more biologically relevant pH than that typical of much inorganic work, decreasing Mg/Casw can result in greater long-range order and less water of crystallization but facilitates precipitation at a considerably lower CO3 2– than at higher pH.
Political parties and interest groups play a vital role in incorporating societal interests into democratic decision‐making. Therefore, explaining the nature and variation in the relationship between ...them will advance our understanding of democratic governance. Existing research has primarily drawn attention to how exchange of resources shapes these relationships largely neglecting the role of contextual conditions. Our contribution is to examine whether parties’ structured interactions with different categories of interest groups vary systematically with the pattern of party competition at the level of policy dimensions. First, we argue that higher party fragmentation in a policy space makes organisational ties to interest groups more likely, due to fears of voter loss and splinter groups. Second, we expect higher polarisation between parties on a policy dimension to make ties to relevant groups less likely due to increased electoral costs. We find support for both expectations when analysing new data on 116 party units in 13 mature democracies along nine different policy dimensions. Our findings underline the value of considering the strategic context in which parties and interest groups interact to understand their relationship. The study sheds new light on parties and interest groups as intermediaries in democracy and contributes to a new research agenda connecting interest group research with studies of parties’ policy positions and responsiveness.
This article demonstrates that two quite distinctive types of political disaffection – ‘dissatisfied democratic’ and ‘stealth democratic’ – exist among British citizens, with the former being more ...prevalent. While both types manifest low trust in political elites, the dissatisfied democrat is politically interested, efficacious and desires greater political participation, while the contrary is generally true of the stealth democrat. However, stealth democrats are favourably disposed towards direct democracy, which can be attributed to the populist nature of stealth democratic attitudes. Even so, when given the opportunity to take part in a national referendum, neither stealth democrats nor dissatisfied democrats showed much inclination to vote.
Recent developments in British politics have foregrounded two issues of particular importance to Britons living overseas: their voting rights in the UK and Brexit. In light of this, the number of ...British expatriates registering to vote has risen sharply and provided an incentive to develop UK parties abroad. We, therefore, set out the history and organisational structures of the major British parties abroad, and report the results of a unique online survey of British expatriate citizens, which tests whether 'Votes for Life' and Brexit have significantly impacted on their political preferences. We find that latter has done so, but the former has not. In view of this, the historically embedded expectations of a general expatriate preference for the Conservative Party no longer apply to those based in EU countries. In the wake of Brexit, this group appears to have swung decisively against the party and turned towards Labour and the Liberal Democrats. This suggests that the likelihood of the current Conservative administration introducing legislation to extend expatriate Britons' voting rights, as pledged in the Queen's Speech of December 2019, is remote, raising existential questions for the future of UK parties abroad.
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