Non-Abelian monopoles break color. I. Classical mechanics

Monopoles which are sources of non-Abelian magnetic flux are predicted by many models of grand unification. It has been argued elsewhere that a generic transformation of the "unbroken" symmetry group H cannot be globally implemented on such monopoles for reasons of topology. In this paper, we show that similar topological obstructions are encountered in the mechanics of a test particle in the field of these monopoles and that the transformations of H cannot all be globally implemented as canonical transformations. For the SU(5) model, if H is SU(3)C×U(1)em, a consequence is that color multiplets are not globally defined, while if H is SU(3)C×SU(2)WS×U(1)Y, the same is the case for both color and electroweak multiplets. There are, however, several subgroups KT, KT′,… of H which can be globally implemented, with the transformation laws of the observables differing from group to group in a novel way. For H=SU(3)C×U(1)em, a choice for KT is SU(2)C×U(1)em, while for H=SU(3)C×SU(2)WS×U(1)Y, a choice is SU(2)C×U(1)×U(1)×U(1). The paper also develops the differential geometry of monopoles in a form convenient for computations

Non-Abelian monopoles break color. II. Field theory and quantum mechanics

Many grand unified theories (GUT's) predict non-Abelian monopoles which are sources of non-Abelian (and Abelian) magnetic flux. In the preceding paper, we discussed in detail the topological obstructions to the global implementation of the action of the "unbroken symmetry group" H on a classical test particle in the field of such a monopole. In this paper, the existence of similar topological obstructions to the definition of H action on the fields in such a monopole sector, as well as on the states of a quantum-mechanical test particle in the presence of such fields, are shown in detail. Some subgroups of H which can be globally realized as groups of automorphisms are identified. We also discuss the application of our analysis to the SU(5) GUT and show in particular that the non-Abelian monopoles of that theory break color and electroweak symmetries

A Transnational Field Approach to the Study of Labor Trafficking

Labor trafficking has increasingly become a subject of policy and research due to the rise in cross-border mobility and globalization. Whereas labor trafficking is generally approached through a criminal justice frame of transnational organized crime, in this contribution, a broader transnational social field approach is advocated. It is argued that this does more justice to the complex interconnectedness of contemporary reality and allows us to understand better how vulnerability on which human trafficking feeds is created. It is argued that a transnational field approach to labor trafficking allows us to understand better the different forms in which labor trafficking comes and the different ways in which transnational space plays a role in these. The Netherlands is used as an empirical illustration. It is illustrative of how transnational space plays a different role in three types of labor trafficking. For each type, three phases in the labor trafficking process are scrutinized: recruitment, transportation, and the phase of work. It is concluded that it would be helpful to approach labor trafficking not solely from a criminal justice perspective of transnational organized crime but to also include more locally rooted approaches from a labor migration perspective, including a transnational field approach.NWO451-15-025Criminal Justice: Legitimacy, accountability, and effectivit

Sclerotherapy of hydroceles and spermatoceles with alcohol: results and effects on the semen analysis

PURPOSE: To evaluate the success rates of sclerotherapy of the tunica vaginalis with alcohol for the treatment of hydroceles and/or spermatoceles, as well as, evaluation of pain, formation of hematomas, infection and its effects in spermatogenesis . MATERIALS AND METHODS: A total of 69 patients, with offsprings and diagnosis of hydrocele and/or spermatocele, were treated during the period from April 2003 to June 2007. Semen analysis was obtained from patients who were able to provide us with samples. The sclerotherapy with alcohol at 99.5% was undertaken as outpatient procedure. RESULTS: The average volume drained pre-sclerotherapy was 279.82 mL (27 to 1145). The median follow-up was 43 months (9 to 80). A total of 114 procedures were performed on 84 units, with an average of 1.35 procedures / unit and an overall success rate of 97.62%. Of the 69 patients, 7 (10.14%) reported minor pain immediately after the procedure, 3 (4.35%) moderate pain and 2 (2.89%) intense pain. Post-Sclerotherapy spermograms revealed reduction of the parameters regarding: concentration, motility and morphology up to 6 months post procedure , with return to normal parameters 12th months after procedure. CONCLUSIONS: Sclerotherapy of hydroceles and spermatoceles with 99.5% alcohol is an efficient procedure that can be perormed without difficulties, cost-effectiveness, with few side effects and which may be performed in patients who wish fertility