Nitrogen Trichloride with Benzalacetophenone

Nitrogen trichloride and benzalacetophenone in carbon tetrachloride solution between 20° and -15 ° react to form free nitrogen, ammonium chloride, benzalacetophenone dichloride, and a C-chloro-N -dichloroamino ketone. This compound can be reduced to the C-chloroamino ketone by means of concentrated hydrochloric acid. The hydrochloride and the benzoyl derivative of this compound were isolated and analyzed

Tricarbonylchlorido(6'7'-dihydro-5’H-spiro[cyclopentane-1,6'-dipyrido-[3,2-d:2',3'-f][1,3]diazepine]-κ2N1,N11)-rhenium(I)

In the title compound, [ReCl(C15H16N4)(CO)3], the ReI ion is coordinated in a distorted octahedral geometry by one Cl atom, two N atoms of the bidentate ligand and three carbonyl groups. The cyclopentane group is orientated in a transoid fashion with respect to the chloride ligand. The dihedral angle between the pryridine rings is 10.91 (12)°. In the crystal, N-H...Cl hydrogen bonds link complex molecules, forming a two-dimensional network parallel to (001)

Creating Object-Based Stimuli to Explore Media Device Orchestration Reproduction Techniques

Media Device Orchestration (MDO) makes use of interconnected devices to augment a reproduction system, and could be used to deliver more immersive audio experiences to domestic audiences. To investigate optimal rendering on an MDO-based system, stimuli were created via: 1) object-based audio (OBA) mixes undertaken in a reference listening room; and 2) up to 13 rendered versions of these employing a range of installed and ad-hoc loudspeakers with varying cost, quality and position. The programme items include audio-visual material (short film trailer and big band performance) and audio-only material (radio panel show, pop track, football match, and orchestral performance). The object-based programme items and alternate MDO configurations are made available for testing and demonstrating OBA systems

Tricarbonylchlorido(6’,7’-dihydro-5’H-spiro[cyclohexane-1,6’-dipyrido[3,2-d :2’,3’-f][1,3]diazepine]-κ2N1,N11)rhenium(I)

In the title compound, [ReCl(C16H18N4)(CO)3], the ReI ion is coordinated in a distorted octahedral geometry by one Cl atom, two N atoms of the bidentate ligand and three carbonyl groups. The cyclohexane group is orientated in a transoid fashion with respect to the chloride ligand. In the crystal, N-H...Cl hydrogen bonds link complex molecules, forming a two-dimensional network parallel to (100)

Resolving intrastate conflicts : a case study of Sierra Leone

This study set out to examine the interplay of negotiations and military intervention in the resolution of the conflict in Sierra Leone between 1991 and 2002, and to draw lessons from this process for the resolution of intrastate conflicts in Africa. To achieve this, a more detailed analysis was undertaken on: the evolution and progress of the conflict in Sierra Leone (Chapter two); the various military interventions (Chapter three); and the various peace agreements (Chapter four). What has come to light is that it is important to distinguish between the triggers to the conflict and the drivers of the conflict. In the case of Sierra Leone, the trigger was ECOMOG’s entry into Liberia – an event that was mistakenly seen as the main cause of the conflict and leading to wrong decisions on how to end the conflict. It is also clear that greed was at the centre of the conflict in Sierra Leone since control of natural resources appear to be the main push factors behind most of the fighting. Control of these resources gave the holders an advantage. Progress in negotiations was determined by demands and concessions by those in control of the resources. An additional dimension that was common to many conflicts in Africa was control of the country’s capital city. Possession of this bestowed visible power to the holders. It is because of this that Freetown became the centre of many bouts of conflict. The study highlighted a number of issues that impact on the duration and outcome of intrastate conflicts. The first concerns the risks of sidelining the army that had played a significant role in governing the country. To do so, in favour of a civilian militia, was inviting trouble. This mistake extended the conflict by at least another two years. Also important was the issue of the over-militarisation of society. As the state structures failed, patronage and resources acted as drivers for the formation of other armed factions. The proliferation of armed factions made finding a solution more problematic. Increasing militarisation was further driven by the role of by neighbouring countries. This complicated the search for a political solution, as members of the regional group, ECOWAS, actively supported various sides in the conflict. While it was encouraging to see ECOWAS attempting to resolve the conflict, it could not sustain the role of being both a player and referee at the same time. As a result of this, ECOWAS itself contributed to the prolonging of the conflict. The intervention by the United Kingdom demonstrated that actors with superior force are in a position to make decisive interventions to help end conflicts. At the international level, the question on leaving conflict management to regional bodies is not a panacea for solving intrastate conflicts. The United Nations Security Council initially relied on ECOWAS to manage the conflict, but was later forced to take over the active peacekeeping role. It was also only when the United Nations began reflecting on earlier peacekeeping failures, such as Rwanda and Somalia, that new peacekeeping approaches began to emerge. This reflection also generated the continuing debate on the “Responsibility to Protect” vulnerable populations in intrastate conflict.Dissertation (MDiplomatic Studies)--University of Pretoria, 2010.Political Sciencesunrestricte

Decays of metastable vacua in SQCD

The decay rates of metastable SQCD vacua in ISS-type models, both towards supersymmetric vacua as well as towards other nonsupersymmetric configurations arising in theories with elementary spectators, are estimated numerically in the semiclassical approximation by computing the corresponding multifield bounce configurations. The scaling of the bounce action with respect to the most relevant dimensionless couplings and ratios of scales is analyzed. In the case of the decays towards the susy vacua generated by nonperturbative effects, the results confirm previous analytical estimations of this scaling, obtained by assuming a triangular potential barrier. The decay rates towards susy vacua generated by R-symmetry breaking interactions turn out to be more than sufficiently suppressed for the phenomenologically relevant parameter range, and their behavior in this regime differs from analytic estimations valid for parametrically small scale ratios. It is also shown that in models with spectator fields, even though the decays towards vacua involving nonzero spectator VEVs don't have a strong parametric dependence on the scale ratios, the ISS vacuum can still be made long-lived in the presence of R-symmetry breaking interactions.Comment: 22 pages, 7 figure

Virtual Project Management Of Globally Outsourced IT Projects

The existing literature on how globally outsourced information technology (IT) projects are reliant on technology for virtual project management was extended by presenting a new framework for virtual project management and analyzing the current internet-based collaborative tools that facilitate their effectiveness. This assertion derives from an effort to answer the following research question: How are globally outsourced IT projects reliant on technology for virtual project management