Multiple Scales in Pati-Salam Unification Models

We investigate models where gauge unification (GUT) proceeds in steps that include Pati-Salam symmetry. Beyond the Standard Model, we allow for a well-defined set of small representations of the GUT gauge group. We show that all possible chains of Pati-Salam symmetry breaking can be realized in accordance with gauge-coupling unification. We identify, in particular, models with unification near the Planck scale, with intermediate left-right or SU(4) quark-lepton symmetries that are relevant for flavor physics, with new colored particles at accessible energies, and with an enlarged electroweak Higgs sector. We look both at supersymmetric and non-supersymmetric scenarios.Comment: 48 pages, 11 figures, version accepted for publication in JHE

Combining Pati-Salam and Flavour Symmetries

We construct an extension of the Standard Model (SM) which is based on grand unification with Pati-Salam symmetry. The setup is supplemented with the idea of spontaneous flavour symmetry breaking which is mediated through flavon fields with renormalizable couplings to new heavy fermions. While we argue that the new gauge bosons in this approach can be sufficiently heavy to be irrelevant at low energies, the fermionic partners of the SM quarks, in particular those for the third generation, can be relatively light and provide new sources of flavour violation. The size of the effects is constrained by the observed values of the SM Yukawa matrices, but in a way that is different from the standard minimal-flavour violation approach. We determine characteristic deviations from the SM that could eventually be observed in future precision measurements.Comment: 26 pages, 5 figure

Government and Social Media: A Case Study of 31 Informational World Cities

Social media platforms are increasingly being used by governments to foster user interaction. Particularly in cities with enhanced ICT infrastructures (i.e., Informational World Cities) and high internet penetration rates, social media platforms are valuable tools for reaching high numbers of citizens. This empirical investigation of 31 Informational World Cities will provide an overview of social media services used for governmental purposes, of their popularity among governments, and of their usage intensity in broadcasting information online.Comment: In Proceedings of the 47th Hawaii International Conference on System Sciences (pp. 1715-1724). IEEE Computer Society, 201

РЕЗУЛЬТАТы ЭКСПЕРИМЕНТАЛЬНыХ ИССЛЕДОВАНИЙ ВыСШИХ ГАРМОНИЧЕСКИХ СОСТАВЛЯЮЩИХ В СИСТЕМЕ ЭЛЕКТРО-СНАБЖЕНИЯ ШАХТы ИМ. "ГЕРОЕВ КОСМОСА"

Викладено основні результати спостережень та їх короткий аналіз. Частково розкрита проблема електромагнітної сумісності в системі електропостачання шахти ім. Героїв Космосу. Відзначено появу вищіх гармонік та їх джерела а також причини винекнення резонансних явищ. Обгрунтовано необхідність проведення моніторінгу показників якості електроенергії з метою підвищення ефективності її використання